$1.$ Write a c$++$ program that uses for loop to perform the following steps:

a$.$ prompt the user to input two integers: firstNum and secondNum$($ first Number must be less than secondNum$).$

b$.$ output all odd numbers between firstNum and secondNum$.$

c$.$ output the sum of all even numbers between firstNum and secondNum$.$

d$.$ output the sum of the square of the odd numbers between firstNum and secondNum$.$