Determine whether each of the directions specified is feasible at the solution indicated to the linear constraints 3y1 - 2y2 + 8y3 = 14 6y1 - 4y2 - 1y3 … 11 y1, y2, y3 Ú 0

(a) y = 10, 4, 12 at y = 12, 0, 12

(b) y = 10, -4, 12 at y = 12, 0, 12

(c) y = 12, 0, 12 at y = 10, 1, 22

(d) y = 1 -2, 1, 12 at y = 10, 1, 22