Write a complete java program to execute of what is asked in each item below:

a. Input 7 numbers and store it into an array and compute the sum of the 7 inputted numbers at the same time.

b. Display all the contents of the array.

c. Display the 1st , 3rd, 5th , and the 7th elements in the array using for loop.

d. Compute the sum of the 1st , 3rd, 5th , and the 7th elements in the array using for loop.