diff --git a/ex4/code/task_c.py b/ex4/code/task_c.py
index 31102b9..68ceb27 100644
--- a/ex4/code/task_c.py
+++ b/ex4/code/task_c.py
@@ -58,4 +58,4 @@ print("u = ", u)
 
 plt.tight_layout()
 plt.savefig("../task_c.png", dpi=300)
-plt.show()
\ No newline at end of file
+plt.show()
diff --git a/ex4/task_c.png b/ex4/task_c.png
index bd74cb6..35141d8 100644
Binary files a/ex4/task_c.png and b/ex4/task_c.png differ
diff --git a/ex5/code/gh_response.txt b/ex5/code/gh_response.txt
new file mode 100644
index 0000000..433bb71
--- /dev/null
+++ b/ex5/code/gh_response.txt
@@ -0,0 +1,16 @@
+Good summary of results.
+
+1: OK
+
+2: OK
+
+3: OK
+task3.cpp:32
+non initialzed memory for thread 0 (and the other threads)
+
+4: OK
+
+5:
+CRS_Matrix::GetDiag  non parallel
+CRS_Matrix::CalculateLaplace: 
+  "omp critical" is slower than an "omp atomic" for the +=  [worth to test that]
diff --git a/ex5/code/task_1.pdf b/ex5/code/task_1.pdf
new file mode 100644
index 0000000..6461eee
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diff --git a/ex5/code/task_2-5.pdf b/ex5/code/task_2-5.pdf
new file mode 100644
index 0000000..bac9535
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diff --git a/ex5/code/task_5.pdf b/ex5/code/task_5.pdf
new file mode 100644
index 0000000..7fe1fcf
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