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) 6X1 + 3x2 5 400 (2) 3x1 + 2x2 s 250 (3) X1 + X2 S 150 X1, X220 and X2 integer Is this linear program an all-integer linear program or a mixed-integer linear program? 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) Min 5x1 + 6x2 s.t. (1) 4x1 + 6x2 2 8 (2) 4X1 + 8x2 2 12 X1, X2 2 0 and integer Is this linear program an all-integer linear program or a mixed-integer linear program? 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