parametric equation

(a) (2 points) Find the parametric equation of the plane at passing through the points P = (0,0,0), Q = (0,0,1) and S = (1,0,1). Find the coordinates of all the points belonging to the plane whose distance from P is 2. (b) (4 points) Consider the following parametric surface ?1(s,t) = 05351, 05t 0 5 s 5 1, 0 S t