Can you please answer this for me hand written?

A neighborhood has 1000 families. The neighborhood council would like to build a new neighborhood pool, but that will require families to contribute. Each family can choose to contribute or not contribute. If n of them contribute, each contributing family derives the net benefit p(n)=4n, and each of the (1000-n) families that don't contribute derive the net benefit s(n)=5+4n.

1. Show that this is an n-player Prisoner's Dilemma. Explain. (10 pts.)
2. Write the expression for total societal benefit. (10 pts.)