Z K Use the price-demand equation below to determine whether demand is elastic, is inelastic, or has unit elasticity at the indi x= f(p) = 640-2p-0.1p (A) p = 40 (B) p = 65 (C) p = 15 (A) Describe the demand's elasticity for the given price-demand equation at p = 40. Choose the correct answer below. Elastic Unit Elastic O Inelastic (B) Describe the demand's elasticity for the given price-demand equation at p = 65. Choose the correct answer below. O Unit Elastic O Elastic Inelastic (C) Describe the demand's elasticity for the given price-demand equation at p = 15. Choose the correct Inelastic O Elastic O Unit Elastic er below.