Consider the following Linear Programming model: + X2 +n X2 Minimize Z= mx1 + n x2 -X3 mx1 X3 n+1 X1 nx22x3 = 3 1 , x2 , 20 Where m = 2, n = 3 if the sum of the last three digits of your cellular phone number is 5 11 m = 3, n = 1 if the sum of the last three digits of your cellular phone number is > 12 Solve using Dual Simplex Algorithm a. Write the Lp model in equation form. b. Determine the leaving and the entering variables. c. Compute the new pivot row and Si-row