ABCD is a square with edge length 1. A is on the origin and B is on x axis. Define basis B-spline functions using even distributed knots. If a quadratic B-spline curve is defined by six control points ABC DAB, then do the following. (1) How many segments are there in the curve? (2) Calculate the start and end points for each segment. (3) Draw the shape of the curve and indicate the start and end points of each segment in the following Figure. FRO