a=2, b=1,c=8, d= 7 1) Solve the following linear programming model graphically: (30 Points) maximize Z = 5x1 + 5x2 subject to: -5x1 + 6x2.?-30 (if "a" is even then set ? to s; if "a" is odd then set ? to 2) x1 / x2 ?? 2 (if "b" is even then set ?? to 0 a=2, b=1,c=8, d= 7 2) Solve the following linear programming model graphically: (30 Points) minimize Z = a*x1 - b*x2 subject to: 3x1 - 2x2 5-18 x1 + x2 > 5 x154 x2 0