Question 1057097
Assuming that the given points (a, b, c, d) are the corner points of the region, all you need
to do is evaluate the objective function at each point by substituting the values for x and y 
at that point.


For example, for point a, x = 0 and y = 7. Putting these values into the objective function
gives:

 
z = 30(0) + 60(7)


z = 0 + 420


z = 420


Repeat this process for points b, c, and d.