The Toyota Prius is a gasoline/electric hybrid car that gets 54 miles to the gallon. An article in the Wall Street Journal noted that sales of the Prius had been hurt by low gasoline prices and that “Americans are now more likely to trade in a hybrid or an electric vehicle for an SUV.” Does the article indicate that gasoline-powered cars and gasoline are substitutes or complements? Does it indicate that gasoline-powered cars and hybrids are substitutes or complements? Briefly explain.