Identify how the following purchases are counted as part of GDP:
You purchase a used lawn mower at a garage sale. General Motors purchases tires from Goodyear to equip new Chevrolets. You purchase tires from Goodyear to replace worn tires on your car. A neighbor hires you to baby-sit for an evening. You purchase a share of AT&T. A neighbor breaks your window with a golf ball, and you purchase a new window. You pay your tuition for the spring semester.