It is known that the intersection of parabola Y = 3/8x 2-3/4x-3 with X axis is A, D(A is on the right side of D), and the intersection with Y axis is C. 。
(2) If point M is on a parabola, so that the area of △MAD is equal to the area of △CAD, find the coordinates of point M;
(3) If the symmetry point of point C about the parabola axis is B, is there a point P on the parabola, which makes the quadrilateral of four vertices A, B, C and P a trapezoid? If so, request the coordinates of point p.