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 = (11,-8, 20) z= S2 v=(23,--, 75 4' 4 (b) v= S1 + S2 (c) w= (1,-8,12) w= S1 S2 u=