Quantity Marginal Cost $($$$)$ Marginal Revenue $($$$)$

$\backslash$table$[[12,5,9],[13,6,9],[14,7,9],[15,8,9],[16,9,9],[17,10,9]]$

If the firm is maximizing profit, how much profit is it earning?

Select one:

a$.$ There is insufficient data to determine the firm's profit.

b$.$ $$10$

c$.$ $$0$

d$.$ $$1$