Plzz solve..Thank u

11. a) Find the Cartesian equation of the line that passes through the point P(-1,2,3) and is normal to the plane 2.x - 3y+ 4:+8=0. (6marks) b) Given that OP = -3|and OO = 0 , find the coordinates of the point R 2 such that PR PO =1: 2 and the point P, Q and R are collinear. (6marks)