Please answer in C programming. We will be using pointers, declaring them, making them point to another variable, change the content of the referent, make the pointer point to something else, and write and use a function using pass by reference.

1. Write code for a function that receives two parameters (a,and b) by value and has two more parameters (c and d) by reference. All parameters are double. The function works by assigning c to (a/b) and assigning d to (a*b).

From main, use scanf to get two numbers, then call the function, and then display both returned values to the output in a printf statement.

2. After part 1 is completed, write code to get 20 integer numbers from the user. The code then displays how many of those numbers are above the numbers average. Please follow these steps:

a. write a for loop to fill the array with numbers from the user. Use a pointer

b. use an index to pass through all array elements to calculate the average in another loop.

c. write a function, then pass the array, its size, and the average to the function. The function returns the count of the number of elements that are above the average.