Jessica is a 10-year-old entrepreneur. She produces lemonade in her family's kitchen and sells that lemonade at a stand that she sets up in front of her family's house each Saturday afternoon. Jessica has successfully differentiated her lemonade by using Meyer lemons, so she is a monopolistically competitive firm. The demand function for her lemonade is: Qd=38.5-10P where P is the per-cup price of lemonade and Qd is the quantity of cups of lemonade demanded. Jessica's total cost of setting up her lemonade stand and producing lemonade is: I'C{Q)=40+0.65Q where Q is the number of cups of lemonade Jessica produces. Jessica's marginal revenue from producing an additional cup of lemonade is __. (Carefully enter your response as an algebraic expression, using the proper notation in the proper format.,) Jessica's marginal cost of producing an additional cup of lemonade is $__. Jessica's profit-maximizing number of cups of lemonade is __. The price Jessica will charge for a cup of lemonade is