Suppose a competitive firm has as its total cost function: TC = 26 + 3q- Suppose the firm's output can be sold (in integer units) at $61 per unit. Use calculus and formulas to find a solution (don't just build a table in a spreadsheet as in the previous lesson). Hint 1: The first derivative of the total profit function, which is cumulative, is the marginal profit function, which is incremental. The lecture and formula summary explain how to compute the derivative. Set the marginal profit equal to zero to define an equation for the optimal quantity q. Hint 2: When computing the total profit for a candidate quantity, use the total profit function you define (rather than summing the marginal profits using the marginal profit function)