Suppose that (i) each customer who visits amusement parks has a demand curve for roller-coaster rides given by q =12 - 12P; and (ii) each amusement park has a constant marginal cost (MC) equal to $0.50 per ride. Assuming amusement parks have the market power needed to impose a two-part tariff, which combination of fixed fee (F) and per-ride usage fee (Pu) will they charge each customer? OF = $6 and Pu = $1 OF = $6 and Pu = $0.50 OF = $3 and Pu = $1 OF = $3 and Pu = $0.50 OF = $1.50 and Pu = $0.50