Given the information in the table below, complete the monopolist's marginal cost and marginal revenue schedules. Graph the demand, marginal cost, and marginal revenue curves, and find the profit-maximizing point of production. Assuming this monopolistic firm faces fixed costs of $$\$ 10$$, and must charge the same price for all units sold, how much profit does it make?
$$
\begin{array}{ccccc}
\begin{array}{l}
\text { Quantity } \\
\text { Produced } \\
\text { and Sold }
\end{array} & \text { Price } & \begin{array}{l}
\text { Total } \\
\text { Variable } \\
\text { Cost }
\end{array} & \begin{array}{l}
\text { Marginal } \\
\text { Cost }
\end{array} & \begin{array}{l}
\text { Marginal } \\
\text { Revenue }
\end{array} \\
\hline & & & \\
2 & \$ 12 & \$ 5 & \\
3 & 11 & 9 & \\
4 & 10 & 14 & \\
5 & 9 & 20 & \\
6 & 8 & 28 & \\
\end{array}
$$