Task 1: Write a complete C++ program that read 4 marks from user , print their sum and their average. Sum= ml+m2+m3+m4 avg=(m1 +m2+m3+m4/4 16/02/2021 Task 2: Write a C++ program that prompts for and reads the radius and the height of a cylinder (in centimeters). It then computes its volume and surface area. The surface area is the surface of the two circular bases and the surface of the lateral side. Note: a = 3.14159 volume = T p. 2 h surface area = 2arh + 2 nr