A City in Which Residents Value a Clean Environment Is

A city in which residents value a clean environment is deciding whether to institute a mandatory newspaper recycling program. The current program is voluntary. The data in the table show the marginal cost (MC), marginal private benefit (MPB), and marginal social benefit (MSB) of different levels of recycling. Use the data to calculate the private and socially optimal levels of recycling. Draw a graph as part of your response.
$\begin{array}{|c|c|c|c|}\hline \begin{array}{c}\text { Recycled } \\\text { Newspapers (tons) }\end{array} & \text { MC } & \text { MPB } & \text { MSB } \\\hline 1 & \text { S1 } & \$ 8 & \$ 10 \\\hline 2 & \$ 2 & \$ 7 & \$ 9 \\\hline 3 & \$ 3 & \$ 6 & \$ 8 \\\hline 4 & \$ 4 & \$ 4 & \$ 6 \\\hline 5 & \$ 5 & \$ 3 & \$ 5 \\\hline 6 & \$ 6 & \$ 1 & \$ 3 \\\hline\end{array}$