The demand for DVD rentals at Klix Video is given by q = D (x) = 100 - 10x, where q is the number of DVDs rented per day at a dollars per rental. Find each of the following: a) The elasticity as a function of x. (3 points) b) The elasticity at a = 4 and at a = 6. Interpret the meaning of these values of the elasticity. (3 points) c) The value of a for which E (a) = 1. Interpret the meaning of this price. (3 points) d) The total revenue function, R (ac ) = ac . D (ac). (3 points) e) The price a at which total revenue is a maximum. (3 points)