Consider the following LP and its solution Min Z = 2x1 - 3x2 S.t. X1 + x2 >=2 [1] X1 + 4x2 =0 [5] X2>=0 [6] 6 X2 [5] [3] E(0,3) 2 D(0.2) A(4.2) [2] B(4,1) 8 [6] 10 12 C(1,1) 2 [1] (1) Calculate the shadow price of b2 =12 (2) Calculate the allowable increase/decrease of b4=1 (3) Calculate the allowable increase/decrease of b3=4 (4) Calculate the allowable increase/decrease of bi-2 [4]