1 2 Write a C program using Switch-Case statement. Get a choice from the user. If the choice is 1 : calculate rect = I xb If the choice is 2 : calculate x = (a + b2) Otherwise display "Wrong choice". [7 Marks) Write a C program using any loop to calculate the following series. series = nga + jau + va + var Vint23a [7 Marks] Write a C program using if statement. Get a number from the user. If the number is between 0 to 100 calculate sum of all odd numbers from 1 to 100, print the sum. otherwise calculate sum of all even numbers from 100 to 200, print the sum. [7 Marks) n .... + 3