What should the maximum required number of mugs and bowls be at most to have a feasible region?

You are in the business of making mug and bowls. The profit on each mug is $6 and on each bowl is $4. It takes 8 minutes to make a mug and 6 minutes for a bowl. The number of mugs should be at least 40 and the number of bowl should be at least 50. You have a total of 4 hours of labor.

a) 40 bowls

b) 0 mug and 0 bowl

c) Less than 30 mugs

d) Less than 40 bowls