kindly solve this

Question A3 (9 marks): Consider the demand function Q = f (P, A, Y) = 10000 -400P + 600A + 50Y which describes how the demand @ for a good depends on its price P, the price A of another good and income Y. 1. Calculate the own-price elasticity, cross price elasticity and income elasticity when P = 10, A = 20 and Y - 500. 2. Is demand at these values elastic or inelastic? Is the other good a complement or substitute? Is demand normal