How do you solve this on the calculator?

The graph shows a region of feasible solutions. Use this region to find maximum and minimum values of the objective function. Z=0.40x + 0.60y Select the correct choice below and, if necessary, fill in the answer box to complete your choice. X 10 A. The maximum value is 7 The coordinates of the co O B There is no maximum value. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A The minimum value is 0 O B. There is no minimum value