Using the bog M method to find the maximum value. Maximize P=9x₁+5x₂+6x₃ subject to 2x₁+x₂+2x₃<=56 2x₁+x₂-2x₃=2 x₁,x₂,x₃>=0
a) Maximum value cannot be determined
b) 132
c) 138
d) 142