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 2%, ykl provided by the function y = sinx e-z? and computed with constant step in r 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.)