# Question: there are three groups in a community their demand curves...

###### Question details

There are three groups in a community. Their demand curves for
public television in hours of programming, T, are given
respectively by W_{1} = $100 − T, W_{2} = $300 −
2T, W_{3} = $400 − 2T. Suppose public television is a pure
public good that can be produced at a constant marginal cost of
$200 per hour.

(a) What is the efficient number of hours of public television?

(b) How much public television would a competitive private market provide?