So solution does not check. So something is wrong either in the book or in the problem wne it was written down.
the book says that p=4 and q=2, as answers. these i am assuming are supposed to be obtained by substitution into the parametric equations, as we were doing earlier, but i do not know how to obtain those numbers. also, since they do not match up, does that not simply mean that the point does not lie in the plane?