A manager is seeking to maximize profits based on two products, x and y, which yield $10 and $15, respectively. There are 20 hours each day available and each unit of x requires 4 hours while each unit of y requires 3. If the manager is only looking for an integer solution, which of the following would be optimal?

a.

x = 0, y = 6.67

b.

x = 1, y = 5.33

c.

x = 2, y = 4

d.

x = 0, y = 5

e.

None of the above.