22. Let a = (a1, a2, a3) andb = (b1, b2, 193) be two nonzero vectors such that b 75 ka. Use vectors to describe the set of points inside the parallelogram with vertex P0(x0, yo, Z0) and whose adjacent sides are parallel to a and b and have the same lengths as a and b. (See Figure 1.17.) (Hint: If_1:(x, y, z) is a point in the par- allelogram, describe 0 P, the position vector of P.) x Figure 1 .1 7 Figure for Exercise 22