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 float. (Clue: calculate average first) Definations: 7.DE = *(x; 7) o = standard deviation xi = each value of dataset (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")