diff --git a/Introduction b/Introduction
index b260fe4..c9432bc 160000
--- a/Introduction
+++ b/Introduction
@@ -1 +1 @@
-Subproject commit b260fe439ec66c518db7a4203548b0c9da3c4a21
+Subproject commit c9432bc49a294bdcb1364effbc6de529e449c77d
diff --git a/Lab1 b/Lab1
index 7a92c86..a5b10c3 160000
--- a/Lab1
+++ b/Lab1
@@ -1 +1 @@
-Subproject commit 7a92c86b1d18224c0c3ba987e5aea626a44b998b
+Subproject commit a5b10c3cb82eaf1e6871ed9f56aed23759466c9c
diff --git a/Lab2 b/Lab2
index 28172cb..7de832e 160000
--- a/Lab2
+++ b/Lab2
@@ -1 +1 @@
-Subproject commit 28172cbd01b5a29d5b0c2cb06cd297987590da16
+Subproject commit 7de832e7e05768dafcb77df16d3465afe8765b8a
diff --git a/Lab3 b/Lab3
index 8129d26..647a19c 160000
--- a/Lab3
+++ b/Lab3
@@ -1 +1 @@
-Subproject commit 8129d261267101df6af066d092e67827859c641f
+Subproject commit 647a19c722e3475be8d887333d891470be75db62
diff --git a/Lab4 b/Lab4
index 3c08b04..6ed1429 160000
--- a/Lab4
+++ b/Lab4
@@ -1 +1 @@
-Subproject commit 3c08b04264bc168e057c827f60285ede4063c1cc
+Subproject commit 6ed1429304bbacca254c9299164d8ab8f308dffc
diff --git a/global.json b/global.json
deleted file mode 100644
index 6a2b259..0000000
--- a/global.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-	"sdk": {
-		"version": "2.1.818"
-	}
-}