diff --git a/engr 111 sept 27 2021/andy engr 111 research and design slides sept 2021.pdf b/engr 111 sept 27 2021/andy engr 111 research and design slides sept 2021.pdf
deleted file mode 100644
index f78773b650a5c1c2dac88ab0a3abdb91b99bba58..0000000000000000000000000000000000000000
Binary files a/engr 111 sept 27 2021/andy engr 111 research and design slides sept 2021.pdf and /dev/null differ
diff --git a/engr 111 sept 27 2021/andy engr 111 research and design.pptx b/engr 111 sept 27 2021/andy engr 111 research and design.pptx
index d45abe2038d126717cee47c52a46ed5ca717852d..edf246b87f224458cdf026b756d311b3e5aa8544 100644
--- a/engr 111 sept 27 2021/andy engr 111 research and design.pptx	
+++ b/engr 111 sept 27 2021/andy engr 111 research and design.pptx	
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:75cc9cda4084326991c34af4bb136c95197c3f5ae3df48712c63a438529482f8
-size 123018682
+oid sha256:c27c8fcab503799b0bdd939dcfc987c7d853f268ed3ab9a9a8ed257c153d551d
+size 123001607
diff --git a/engr 111 sept 27 2021/andyCohen engr 111 research and design sept 2021.pdf b/engr 111 sept 27 2021/andyCohen engr 111 research and design sept 2021.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..1f0019b10d88905d3e3afed004a45c90b75c0e4d
--- /dev/null
+++ b/engr 111 sept 27 2021/andyCohen engr 111 research and design sept 2021.pdf	
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:871ef3638eb9af19568d888d6a78ce6b76e08db5feb82fe8fd2b6ac06559c45a
+size 2573959