diff --git a/renv/activate.R b/renv/activate.R
index d09c661..cb5401f 100644
--- a/renv/activate.R
+++ b/renv/activate.R
@@ -2,11 +2,7 @@
 local({
 
   # the requested version of renv
-<<<<<<< HEAD
-  version <- "0.17.3"
-=======
   version <- "1.0.3"
->>>>>>> bfb75e150f9c44c3c6b185486f768e48f1da4e8e
   attr(version, "sha") <- NULL
 
   # the project directory
diff --git a/renv/profiles/lesson-requirements/renv.lock b/renv/profiles/lesson-requirements/renv.lock
index 305efe6..f9e28f5 100644
--- a/renv/profiles/lesson-requirements/renv.lock
+++ b/renv/profiles/lesson-requirements/renv.lock
@@ -17,6 +17,38 @@
     ]
   },
   "Packages": {
+    "MASS": {
+      "Package": "MASS",
+      "Version": "7.3-60",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "grDevices",
+        "graphics",
+        "methods",
+        "stats",
+        "utils"
+      ],
+      "Hash": "a56a6365b3fa73293ea8d084be0d9bb0"
+    },
+    "Matrix": {
+      "Package": "Matrix",
+      "Version": "1.6-1.1",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "grDevices",
+        "graphics",
+        "grid",
+        "lattice",
+        "methods",
+        "stats",
+        "utils"
+      ],
+      "Hash": "1a00d4828f33a9d690806e98bd17150c"
+    },
     "R6": {
       "Package": "R6",
       "Version": "2.5.1",
@@ -161,18 +193,18 @@
     },
     "evaluate": {
       "Package": "evaluate",
-      "Version": "0.22",
+      "Version": "0.23",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
         "R",
         "methods"
       ],
-      "Hash": "66f39c7a21e03c4dcb2c2d21d738d603"
+      "Hash": "daf4a1246be12c1fa8c7705a0935c1a0"
     },
     "fansi": {
       "Package": "fansi",
-      "Version": "1.0.4",
+      "Version": "1.0.5",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
@@ -180,7 +212,7 @@
         "grDevices",
         "utils"
       ],
-      "Hash": "1d9e7ad3c8312a192dea7d3db0274fde"
+      "Hash": "3e8583a60163b4bc1a80016e63b9959e"
     },
     "farver": {
       "Package": "farver",
@@ -230,6 +262,31 @@
       ],
       "Hash": "15e9634c0fcd294799e9b2e929ed1b86"
     },
+    "ggplot2": {
+      "Package": "ggplot2",
+      "Version": "3.4.4",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "MASS",
+        "R",
+        "cli",
+        "glue",
+        "grDevices",
+        "grid",
+        "gtable",
+        "isoband",
+        "lifecycle",
+        "mgcv",
+        "rlang",
+        "scales",
+        "stats",
+        "tibble",
+        "vctrs",
+        "withr"
+      ],
+      "Hash": "313d31eff2274ecf4c1d3581db7241f9"
+    },
     "glue": {
       "Package": "glue",
       "Version": "1.6.2",
@@ -241,6 +298,21 @@
       ],
       "Hash": "4f2596dfb05dac67b9dc558e5c6fba2e"
     },
+    "gtable": {
+      "Package": "gtable",
+      "Version": "0.3.4",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "cli",
+        "glue",
+        "grid",
+        "lifecycle",
+        "rlang"
+      ],
+      "Hash": "b29cf3031f49b04ab9c852c912547eef"
+    },
     "highr": {
       "Package": "highr",
       "Version": "0.10",
@@ -254,7 +326,7 @@
     },
     "htmltools": {
       "Package": "htmltools",
-      "Version": "0.5.6",
+      "Version": "0.5.7",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
@@ -267,7 +339,18 @@
         "rlang",
         "utils"
       ],
-      "Hash": "a2326a66919a3311f7fbb1e3bf568283"
+      "Hash": "2d7b3857980e0e0d0a1fd6f11928ab0f"
+    },
+    "isoband": {
+      "Package": "isoband",
+      "Version": "0.2.7",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "grid",
+        "utils"
+      ],
+      "Hash": "0080607b4a1a7b28979aecef976d8bc2"
     },
     "jquerylib": {
       "Package": "jquerylib",
@@ -291,7 +374,7 @@
     },
     "knitr": {
       "Package": "knitr",
-      "Version": "1.44",
+      "Version": "1.45",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
@@ -303,7 +386,7 @@
         "xfun",
         "yaml"
       ],
-      "Hash": "60885b9f746c9dfaef110d070b5f7dc0"
+      "Hash": "1ec462871063897135c1bcbe0fc8f07d"
     },
     "labeling": {
       "Package": "labeling",
@@ -316,6 +399,21 @@
       ],
       "Hash": "b64ec208ac5bc1852b285f665d6368b3"
     },
+    "lattice": {
+      "Package": "lattice",
+      "Version": "0.22-5",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "grDevices",
+        "graphics",
+        "grid",
+        "stats",
+        "utils"
+      ],
+      "Hash": "7c5e89f04e72d6611c77451f6331a091"
+    },
     "lifecycle": {
       "Package": "lifecycle",
       "Version": "1.0.3",
@@ -350,6 +448,23 @@
       ],
       "Hash": "e2817ccf4a065c5d9d7f2cfbe7c1d78c"
     },
+    "mgcv": {
+      "Package": "mgcv",
+      "Version": "1.9-0",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "Matrix",
+        "R",
+        "graphics",
+        "methods",
+        "nlme",
+        "splines",
+        "stats",
+        "utils"
+      ],
+      "Hash": "086028ca0460d0c368028d3bda58f31b"
+    },
     "mime": {
       "Package": "mime",
       "Version": "0.12",
@@ -371,6 +486,20 @@
       ],
       "Hash": "6dfe8bf774944bd5595785e3229d8771"
     },
+    "nlme": {
+      "Package": "nlme",
+      "Version": "3.1-163",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "graphics",
+        "lattice",
+        "stats",
+        "utils"
+      ],
+      "Hash": "8d1938040a05566f4f7a14af4feadd6b"
+    },
     "pillar": {
       "Package": "pillar",
       "Version": "1.9.0",
@@ -444,14 +573,14 @@
     },
     "rlang": {
       "Package": "rlang",
-      "Version": "1.1.1",
+      "Version": "1.1.2",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
         "R",
         "utils"
       ],
-      "Hash": "a85c767b55f0bf9b7ad16c6d7baee5bb"
+      "Hash": "50a6dbdc522936ca35afc5e2082ea91b"
     },
     "rmarkdown": {
       "Package": "rmarkdown",
@@ -580,27 +709,27 @@
     },
     "tinytex": {
       "Package": "tinytex",
-      "Version": "0.47",
+      "Version": "0.48",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
         "xfun"
       ],
-      "Hash": "8d4ccb733843e513c1c1cdd66a759f0d"
+      "Hash": "8f96d229b7311beb32b94cf413b13f84"
     },
     "utf8": {
       "Package": "utf8",
-      "Version": "1.2.3",
+      "Version": "1.2.4",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
         "R"
       ],
-      "Hash": "1fe17157424bb09c48a8b3b550c753bc"
+      "Hash": "62b65c52671e6665f803ff02954446e9"
     },
     "vctrs": {
       "Package": "vctrs",
-      "Version": "0.6.3",
+      "Version": "0.6.4",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
@@ -610,7 +739,7 @@
         "lifecycle",
         "rlang"
       ],
-      "Hash": "d0ef2856b83dc33ea6e255caf6229ee2"
+      "Hash": "266c1ca411266ba8f365fcc726444b87"
     },
     "viridisLite": {
       "Package": "viridisLite",
@@ -624,7 +753,7 @@
     },
     "withr": {
       "Package": "withr",
-      "Version": "2.5.1",
+      "Version": "2.5.2",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
@@ -633,18 +762,18 @@
         "graphics",
         "stats"
       ],
-      "Hash": "d77c6f74be05c33164e33fbc85540cae"
+      "Hash": "4b25e70111b7d644322e9513f403a272"
     },
     "xfun": {
       "Package": "xfun",
-      "Version": "0.40",
+      "Version": "0.41",
       "Source": "Repository",
       "Repository": "CRAN",
       "Requirements": [
         "stats",
         "tools"
       ],
-      "Hash": "be07d23211245fc7d4209f54c4e4ffc8"
+      "Hash": "460a5e0fe46a80ef87424ad216028014"
     },
     "yaml": {
       "Package": "yaml",