Which of the following projects would be considered independent, assuming the company has adequate capital?

1.A project to purchase new delivery vehicles and a project to instead lease new delivery vehicles.

2.A project to upgrade the computers which control the manufacturing process, and a project to replace the computers which control the manufacturing process.

3.A project to purchase new delivery vehicles and a project to upgrade the current manufacturing facilities.

4.A project to build a new parking lot on an unused piece of land and a project to build a new warehouse on the same piece of land.