Kalyan Singhal Corp. makes three products, and it has three machines available as resources as given in the following LP problem: Maximize contribution = 6X +8X2 +4X3 1X +7X2 +4X3 72 (C: hours on machine 1) 2X + 1X2 +7X3 76 (C2 hours on machine 2) 8X + 4X2 + 1X3 72 X1, X2, X3 20 (C3: hours on machine 3) a) Using a computer software for solving LP, the optimal solution achieved is: X = = (round your response to two decimal places).