Classify each of the following into the components of U.S. GDP: consumption expenditure, investment, government purchases of goods and services, exports, or imports.

1. The purchase in Portland of a Sony DVD player made in Japan.
2. A family's purchase of a birthday cake at the local Safeway grocery store.
3. Microsoft's purchase of 100 Dell servers.
4. The purchase of a new pizza oven by a Pizza Hut in Houston.
5. The U.S. government's purchase of 15 stealth fighters.