7. (6 points each) Given the points P(3, -2, 0), Q(2, -1, 5), and R(3, 1, 4). (a) Find an equation of the plane containing all three points P, Q, and R. (Note: you must fully simplify the answer./ (b) Find the area of the triangle PQR. /Note: you can use appropriate results from part (a) without redoing all that work here./