In Exercises 1-4, which of (I)-(IV) lie on the graph of the function z = f(x, p)? I. (1, 0, 1) II. (V8, 1.3) III. (-3,7,-3) IV. (1, 1, 1/2) 1. f(x, y) = -3 2. f (x, y) = V + 3. f (x, y) = 1/(x]+1/ ) 4. f (x, y) = 4- y7. Without a calculator or computer, match the functions with their graphs in Figure 12.29. (a) 1= (b) z=-ex (c) z= x+2y+3 (d) z=- (e) z= x' - sin y. (1) Z (M) (V) X Figure 12.2930. Without a calculator or computer, match the functions with their cross-sections with x fixed in Figure 12.30. (a) z=1/(1+x +y) (b) z=1+xty (c) z=exty (d) z=ex-> (e) z = sin(xy) X= ()