The coordinates of the four control points of a cubic Bezier curve are: 2 (2.5 (3.5) R,2,R, 3 R = 3,R,=2) 2 2 (1) (ii) (iii) Write the equation of the Bezier curve in the parametric form R(u). Find the position, tangent, curvature at u = 0.5 Show that the tangent vector of a cubic Bezier curve is parallel to (R - Ro) at the start point of a Bezier curve and its parallel to (R - R3) at the end point.