a) Write a subroutine that calculates Xn , where X, and n are integers provided for the subroutine through any chosen registers. b) Use The above program as a subroutine to calculate X+a.X2+a2 .x3+a3 .X4 where a=2, and X=3. c) Calculate the maximum value of X that would give a correct result. subroutine using intel 8088