• Solve the following LP using x3 and x4 as the starting basic variables and without using any artificial variables. Minimize z = 3x1 + 2x2 + 3x3 subject to: x1 + 4x2 + x3 >=7 2x1 + x2 + x4 >=10 x1>=0, x2>=0, x3>=0, x4>=0