Economics Homework Help

I’m studying for my Micro Economics class and don’t understand how to answer this. Can you help me study?

Assume that Zimbabwe and Portugal can switch between producing toothbrushes and producing hairbrushes at a constant rate.

	Machine Minutes Needed to Make 1
	Toothbrush	Hairbrush
Zimbabwe	3	10
Portugal	5	6

Which of the following combinations of toothbrushes and hairbrushes could Zimbabwe not produce in 120 minutes?

a. 5 toothbrushes and 11 hairbrushes

b. 30 toothbrushes and 3 hairbrushes