diff --git a/Solutions/arpitmisraw/Task4/wave.png b/Solutions/arpitmisraw/Task4/wave.png
new file mode 100644
index 0000000..11bf0e6
Binary files /dev/null and b/Solutions/arpitmisraw/Task4/wave.png differ
diff --git a/Solutions/arpitmisraw/Task4/wave.py b/Solutions/arpitmisraw/Task4/wave.py
new file mode 100644
index 0000000..a3a8171
--- /dev/null
+++ b/Solutions/arpitmisraw/Task4/wave.py
@@ -0,0 +1,15 @@
+import matplotlib.pyplot as plot
+import numpy as np
+
+
+
+x = np.arange(0, 10, 0.001)  
+y = 2 * np.sin(np.pi *x /4)
+
+plot.title('Sine Wave')
+plot.xlabel('x')
+plot.ylabel('y')
+
+plot.plot(x, y)
+plot.savefig('wave')
+plot.show()
diff --git a/Solutions/arpitmisraw/Task5/threading.py b/Solutions/arpitmisraw/Task5/threading.py
new file mode 100644
index 0000000..7bef23e
--- /dev/null
+++ b/Solutions/arpitmisraw/Task5/threading.py
@@ -0,0 +1,26 @@
+import threading
+
+def factorial(n):
+    i = 1
+    ans = 1
+    while(i <= n):
+        ans *= i
+        i += 1
+    print("Factorial of", n, "is", ans)
+
+
+def square(n):
+    print("Square of", n, "is", n**2)
+
+
+n = int(input())
+t1 = threading.Thread(target=factorial, args=(n,))
+t2 = threading.Thread(target=square, args=(n,))
+t1.start()
+t2.start()
+t1.join()
+t2.join()
+
+
+
+