Cranberry juice costs $6.30 per quart and apple juice costs $3.60 per quart. Terrance wants to make a mixture of apple and cranberry juice that sells for $4.50 per quart. How many quarts q of cranberry juice should he mix with 4 quarts of apple juice to make cranberry-apple at that price? Write an equation to represent this situation. plz help its due today thank you