Hey can you help with Problem 2 and 3 in C language please.

Problem 2. Create a header file which will perform the computation of A8 and its accompanying c script. Conditions: Main part of the script should prompt the user for the value of A and B. Do not use pow() in C and do not include math.h file in your script!!! Problem 3. Create a header file which will make a decision on the size of a shape based on the user input. When the user is prompted, (s he would type in a number (Radius of a Circle or Side of a Square) then, "R" for radius and "S" for square. 3.14 x R2or SXS. You need to use C preprocessor conditions to decide whether to perform