Which of the following would be considered long-run choices? Which are short-run choices?

1. A dentist hires a new part-time dental hygienist.
2. The local oil refinery plans a complete restructuring of its production processes, including relocating the plant.
3. A farmer increases the quantity of water applied to his or her fields.
4. A law partnership signs a 3-year lease for an office complex.
5. The university hires a new football coach on a 3-year contract.