For each of the following purchases, does the purchase represent a capital or a revenue expenditure?

1. Complete remodeling of a restaurant dining room at a cost of $80,000.
2. Repainting the exterior of a delivery truck at a cost of $500.
3. Purchase of a pizza oven at a cost of $18,000.
4. Purchase of a dozen pencil sharpeners with a life of ten years at a total cost of $65.
5. Overhaul of the engine on a tour bus at a cost of $5,000, extending the life of the bus by five years.
6. Purchase of a computer system at a cost of $35,000.