Write a user-defined function with function call m = midpoint_ seq(a,b,tol) where a and b are constants such that a < b, and tol is a specified tolerance. The function first calculates the midpoint m1 of the interval [a, b], then the midpoint m2 of [a, m1], then the midpoint m3 of [a, m2], and so on. The process terminates when two successive midpoints are within tol of each other. Allow a maximum of 20 iterations. The output of the function is the sequence m1, m2, m3, . . . . Execute the function for a = 4, b = 10, tol = 10^3