Valuinc is a retailer of peanut butter that is considering switching its business model to a membership-only warehouse club. It sells 80 oz. jars of peanut butter (under its private label 'Renton Collection'), for which the typical household has an annual demand that has been estimated as Qd (p) = 14 – 0.8p, where Q is the quantity and p is the price of a jar. Valuinc's marginal cost of a jar of peanut butter is the $5 it pays the manufacturer. a) Find Valuinc's optimal price of a peanut butter jar if it charges no club membership fee. b) Find Valuinc's optimal pricing strategy if it can choose to charge a price per jar of peanut butter, an annual club membership fee, or some combination of both.