For the following demand function, find a. E, and b. the values of q (if any) at which total revenue is maximized. p = 300e-0.5q . . . a. Find the elasticity of demand (E) in terms of q. E(q) = b. Find the values of q (if any) at which total revenue is maximized. Select the correct choice below, and if necessary, fill in the answer box within your choice. O A. Revenue is maximized at q = (Type an integer or a simplified fraction.) O B. No values of q maximize revenue