Tom's Flower Sales (a firm with significant market power) sells Protea flowers for use at weddings. Over the years, his research suggests that the demand for Proteas is = 50 2. He can ethically source Proteas at R4 per Protea. Use this information to answer the following questions. a) Calculate the MRS when Tom sells 5 Proteas. [2] b) Calculate the MRT when Tom sells 5 Proteas. [2] c) Given the information in the first two questions, what should Tom do to maximise profit? Explain your answer clearly. [2] d) Calculate the consumer and producer surplus at Tom's profit-maximising equilibrium price and quantity. Graph this equilibrium, clearly showing the consumer and producer surplus. Make sure you label your diagram and axes correctly. [6