solve in C Language programming? full source code and comment

- 2-[10p] Write a function that displays a solid square of **" whose side is specified in integer parameter side. 3- [30p] Write a function that determines standart deviation of float array. The function takes dataset as a float array parameter!! And it also return result as a float. (Clue: calculate average first) Definations: HD N 1 (x 7)2 = N i=1 o = standard deviation xi = each value of dataset t (with a bar over it) = the arithmetic mean of the data (This symbol will be indicated as average of dataset) N = the total number of data points (if you need square root of some number you can use sqrt function in math.h library. Usage example: a=sqrt(b): which means "a" is equal to square root of "b")