11. The demand curve for the new computer game, Rock and Roll Trivia, is given as follows: Q = 200 - 5P - 1Pc - .5Pd + .2A- 0.51 where P is the price of the game Pc is the price of a computer Pd is the price of a diskette A is the level of advertising I is the level of income Suppose P = 10, Pc = 100, Pd = 2, A = 5, and I =50. What is the income elasticity of demand? A) 0 B) -23/5 C) 1 D) -5/23 E) none of the above