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 30x1 + 25x2 s.t. 3x1 +1.5x2400 1.5x1 + 2x2 ≤ 250 1x11x2150 X1, X20 and x2 integer 32519332 b. Min 3x1 + 4x2 s.t. 2x+4x28 2x1 + 6x2 ≥ 12 X1, X220 and integer