i need help

36.It can be concluded from this graph that....... A. Both products A and B are price elastic. B. Both products A and B are price Inelastic, C. Product A Is more elastic than product B. D. Product B is more elastic than product A 37. The price of good X rises by 20 %. As a result the demand for a substitute good Y rises by 10 %. What is the cross-elasticity of demand for good Y with respect to good X? A. +2 B. +0.5 C. - 0.5 D. - 2 38 A good has a unitary price elasticity of demand and at a price of R20 a firm sells 40 000 units, How many will the firm sell if it charges a price of R5? A. 10 000 B. 100 000 C. 160 000 D. 70 000