added task1,task2,task3

task1.py

+def function1( string1 , string2 , listVariable ) :
+    new_tuple = list(map(lambda x,y: (x,y),list(string1),list(string2)))
+    listVariable.extend(new_tuple)
+    return listVariable
+
+list1 = [1,2,3,4,5]
+print( list1 )
+list2 = function1("Tarun","CSE",list1)
+print( list2 )

task2.py

+def function2( listVariable,n ) :
+	print( list(map(lambda x: x[n],listVariable)))
+	return sorted( listVariable, key= lambda x: x[n] )

task3.py

+import sys
+file = open('matrix.txt',"r")
+output = open('transpose.txt',"w")
+filedata = file.readlines()
+row,col = map(int,filedata[0].split())
+filedata.pop(0)
+output.write(str(col) + " " + str(row) + "\n")
+A,r,c = [[None for x in range(col)] for y in range(row)] , 0 , 0
+AT = [[None for x in range(row)] for y in range(col)]
+for line in filedata:
+	c = 0
+	for element in line.split():
+		A[r][c] = element
+		c = c + 1
+	r = r + 1
+for r in range(col):
+	for c in range(row):
+		AT[r][c] = A[c][r]
+		output.write(str(AT[r][c]) + " ")
+	output.write("\n")
+file.close();
+output.close();
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