A farmer raises goats and cows. Each goat requires 400 square feet of grazing area and
each cow requires 1200 square feet of grazing
area. The farmer has 36,000 square feet of
grazing area. Write a function to represent
the combination of goats and cows the farmer
can raise. If the farmer raises only cows, how
many can he raise? If the farmer raises only
goats, how many can he raise?