Exercise 1 Write a program in C Language to calculate the area and circum of a circle, Note: define PI =3.14 use double radius Exercise 2 Write a C function which accepts an integer representing size of memory in GB. The function should return the equivalent size of memory in MB and KB. For example, if the input is 20, the outputs should be 20480 and 20971520. Note that IGB - 1024 M3 and IGB 1024 1024 KB