Given the data provided in the table below, what will the marginal cost be equal to if the current level of production is (Q) level 5 and then production will increase to the quantity (Q) level 6? Q P TC TR MR MC Profit $4 $12 1 $4 $16 2 $4 $20 3 $4 $26 4 $4 $32 5 $4 $33 6 $4 $39 7 $4 $45