Indicate which of the following is an all-integer linear program and which is a mixed-integer linear program. Write the LP Relaxation for the problem but do not attempt to solve. (a) ( Max 60x1 + 55x2 s.t. (1) 7x + 3.5x2 S 400 (2) 3.5%, + 2x2 s 250 (3) X + X2 S 150 X11*2 2 0 and X2 integer Is this linear program an all-integer linear program or a mixed-integer linear program? O This is an all-integer linear program. . This is a mixed-integer linear program. Write the LP Relaxation for the problem. Max s.t. (1) (2) (3) --Select-- (b) (b Min 9x1 + 10x2 s.t. (1) 8x1 + 10x2 2 8 (2) 8x1 + 12x2 2 12 X1, X2 2 0 and integer Is this linear program an all-integer linear program or a mixed-integer linear program? O This is an all-integer linear program. This is a mixed-integer linear program. Write the LP Relaxation for the problem. Min s.t. (1) (2) ---Select--- X, 20 X20 X1, X220 X1, X2 > 0 and X, integer X1, X2 = 0 and X1, Xz integer NI