The following incomplete table (attached) shows a firm's various costs of producing up to 4 units of output.

For questions 1 - 3, use the following information. The following incomplete table shows a rm's various coats of producing up to 4 units of output. m------ umn- n--m---- E---Elil--- ------E- ------- 2. Suppose that the rm whose cost structure is given in the table above can sell any whole number amount (I, 1, 2, 3, or 4, at a unit price of $4D. What is the quantity that maximizes its prot? {a} '3 {b} 4 {-3} 3 {d} 2