Need help with Econ question 18

Artem's Day Spa sells facials at different prices to different groups of customers. The demand that the owner faces from each of two groups is depicted below. What price should he charge, and how many facials should he plan to provide for each group? Group A Group B Price Price $130 $100 Marginal cost Marginal cost $60 $60 Marginal Marginal revenue Demand revenue Demand 40 50 90 Quantity 25 40 50 90 Quantity O Group A: P = $60, Q = 40; Group B: P = $60, Q = 25 Group A: P = $130, Q = 90; Group B: P = $100, Q = 50 Group A: P = $60, Q = 90; Group B: P = $60, Q = 90 Group A: P = $130, Q = 40; Group B: P = $100, Q = 25