The demand for rubber erasers consists of two components. The first component is the demand for rubber erasers by art students. This demand is given by QA = 19,500 - 300P. The second component is the demand for rubber erasers by all others. This demand is given by Qo = 30,000 - 2,500P. (a) What is the total quantity demanded of rubber erasers if the price of an eraser is: (1) $2 (ii) $5 (iii) $20 (iv) $40 (V) $70 (b) Assume that the supply of rubber erasers is given by Qs = 39,900 + 2,000P. (i) Find the equilibrium price and the equilibrium quantity. (ii) Calculate the total consumer surplus. [Hint: It may be easier if you calculate the consumer surplus for art students and the consumer surplus for all others separately, and then add them up.] (c) Assume that the supply of rubber erasers is given by Qs = 11,800 + 100P. Find the equilibrium price and the equilibrium quantity