Graph each system of inequalities. Name the coordinates of the

vertices of the feasible region. Find the maximum and minimum

values of the given function.

14. 5≥y≥-3

4x + y ≤ 5

-2x + y ≤ 5

f(x, y) = 4x - 3y

15. x>-10

1 ≥y 2-6

3x + 4y ≤ -8

2y ≥ x - 10

f(x, y) = 2x + y