1. Write v as a linear combination of u and w, if possible, where u = (2, 3) and w = (1, -1). (Enter your answer in terms of u and w. If not possible, enter IMPOSSIBLE.) V = (-2, -3) 2. Solve for w where u = (1, 0, -1, 1) and v = (2, 0, 3, -1). w + 2v = -4u W = 3. Write each vector as a linear combination of the vectors in S. (If not possible, enter IMPOSSIBLE.) S = {(2, -1, 3), (5, 0, 4)} (a) z = (7, -6, 14) Z = + (b) v = 18, - 1 59 4 (c) w = (3, -9, 15) W= )s 1 + (d) u = (2, 1, -1) u = )s 1 +