b$.$ What are the values of the profit$-$maximizing output and price?

Output:

Price: $

c$.$ What are the values of output, price and total revenue when the firm's total revenue is maximized?

Output:

Price: $

Total revenue: $The graph below shows the demand and marginal cost curves for the monopolist Mr$.$ Peanut.

a$.$ Draw the marginal revenue curve. Plot only the endpoints of the graph below.