If no one owns the lake and the government levies a pollution tax, what is the tax per ton of pesticide that achieves the efficient outcome? What is the efficient number of students? If colleges are...

If no one owns the lake and the government levies a pollution tax, what is

the tax per ton of pesticide that achieves the efficient outcome?

What is the efficient number of students? If colleges are private (no government involvement), how many people enroll, what is the tuition, and what