The demand for a product is QD=100-4P-3Px and the supply is QS=10+2P, where Q is the quantity of the product, in thousands of units, Px is the price of another good and P is the price of the product.
1. Estimate the own price elasticity of demand for the product at the equilibrium price and quantity?
2. Determine the cross-price elasticity of demand for the product at the equilibrium price and the quantity?
3. Does the cross-price elasticity provide enough information to calculate whether the product and good X are complements or substitutes?