1. If we want to use a B-spline to interpolate (or fit) data we need to be able to evaluate the values of the Ni,k(ui) given a value of ui. Suppose we are using a second degree (quadratic) B- spline and have chosen a knot vector T={0,0,0,1/3,2/3,1,1,1} (assume the spline is non-periodic). How many control points can we use in this spline? Compute the non-zero function values of Nik(u) at u=.50