Write a program to calculate the value of f(x), the values of x and n are determined by user and u is the average of x. For example. En Xi = x [0] + x[1] + x[2], where xi is series of value in data set (x[i]). (10 marks) f(x) = { X=[]+ + 2x[i] + 4 i=1 i=1 Write a program to calculate the value of f(x), the values of x and n are determined by user and u is the average of x. For example. En Xi = x [0] + x[1] + x[2], where xi is series of value in data set (x[i]). (10 marks) f(x) = { X=[]+ + 2x[i] + 4 i=1 i=1