Use the simplex method to solve the linear programming problem z X1+3x2 +X3 + 4x4 7x2+ X3 + X4 S 80 Maximize subject to 8x1+ X2t 9x3+ X4 S200 X1 20, X2 20, X3 20, x4 20 Select the correct choice below...

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Extracted text: Use the simplex method to solve the linear programming problem z X1+3x2 +X3 + 4x4 7x2+ X3 + X4 S 80 Maximize subject to 8x1+ X2t 9x3+ X4 S200 X1 20, X2 20, X3 20, x4 20 Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. and s2 - x2-x3 -X4 - 1- O A. The maximum is when x1 O B. There is no maximum. Click to select and enter your answer(s). / F3 F6 FS F7 FIO FB $ & 4 5 6 3 7 CO LO