$19.$ Suppose there is a decrease in the U$.$S$.$ selling price of Japanese$-$made cars $($a substitute for American$-$made cars$).$ At the same time, the price of steel in the U$.$S$.,$ used to make American$-$made cars decreases. What would we expect would happen in the market for American$-$made cars? $1.$ The equilibrium price and quantity fall. $2.$ The equilibrium price falls, but the effect on quantity is uncertain.$3.$ The equilibrium quantity falls, but the$$ effect on price is uncertain.$4.$ The equilibrium quantity rises, but the effect on price is uncertain.$5.$ The equilibrium price rises, but the effect on quantity is uncertain.