Please help explain to me how you answer this because i don't know the answers.. thanks

4. Assume that the demand and supply of hamburgers can be represented in the following diagrammatic model. \"ices : : Quannzyfpenod 3 so loo lid no no son :50 no (hamburgetspmd a. What is the equilibrium price and quantity? b. Calculate consumer surplus, producer surplus and social surplus. c. Suppose the quantity supplied is restricted by government regulation to 200 units per month. Calculate the new price, the consumer surplus, producer surplus and social surplus. 5. Suppose that the campus bookstore makes used textbooks available at a price of $30. Anne, Brad, Carolyn, Darren, and Erica plan to buy books and they have their own willingness to pay. Do they gain from their purchases, and if so, how much? Potential Buyer Willingness to Pay (55) Brad Carolyn Darren Eca 10