deviation Write a function that computes the average and standard of four scores. The standard deviation is defined to be the square root of the average of the four values: (si - a)2, where a is average of the four scores s1 s2, s3, and s4. The function will have six parameters and will call two other functions. Embed the function in a driver program that allows you to test the function again and again until you tell the program you are finished