9. [I1 Points] DETAILS 0f100 Submissions Used The demand function for a certain brand of compact discs is given by p=3x24x+ 24 where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. Compute the elasticity of demand when x : 2. O 4 O 1/4 0 1/3 0 8 O 314