4. Suppose that a 20% decrease in the price of electric cars resulted in a 10% decrease in the quantity demanded of gasoline. Calculate the cross- price elasticity of demand coefficient for electric cars and gas and identify if they are substitutes or complements. * 2 substitutes O 1.5 complements O 1 complements .5 substitutes 0 0 -5 substitutes 0 -1 complements 0 -1,5 substitutes O -2 complements 1 point 5. Suppose, instead, that a 10% decrease in the price of gas resulted in a 12% increase in the quantity demanded of gasoline powered cars. Calculate the cross-price elasticity of demand coefficient for gas and cars and identify if they are substitutes or complements.* 6. Suppose incomes increased by 10% and that gasoline consumption increased by 20%. Calculate the income elasticity of demand coefficient for gasoline and identify if it is a normal good or an inferior good. * 1 point 7. Assume that the cross-price elasticity of demand coefficient between cars and planes is 0. Does this make them substitutes, complements, or something else. Explain. * Your