The allowable variation is from .039 to .041 defective. a. Compute the capability index ( Find the incidence matrix for the graph : use the simplex algorithm to solve the problem: max z = 2x_1-x_2+x_3 s.t. 3x_1+x_2+x_3 \le 60 x_1-x_2+2x_3 \le 10 x_1...