3. (20 pts) B-Spline. Code in MATLAB the B-Spline defined by the points in Problem 1. Plot and print the provided points and the B-Spline on one figure. 4. (20 pts) Monomial least-squares. Code in MATLAB the least-squares estimation of a monomial of degree d using the n data [Tk, yk] provided by the function y = sin re- and computed with constant step in x from -1 and +1. Please plot and print out the points and fitting function for the following (n, d) pairs: (5,3), (10,3), (10,5). (This means you need to run your code with n = 5 and d = 3 and plot it, then run it again for n = 10 and d = 3 and plot that, etc.) point # x 1 10 60 2 50 15 3 75 4 80 130 85 150 6. 95 70