Describe straight line, double declining balance and sum-of-the-years digits depreciation methods.

Sunnyside Hospital purchases $300,000 of testing equipment that has a useful life of 5 years.

The hospital pays $20,000 to install the equipment and make it usable. The hospital also expects that after 5 years, it can sell the equipment for $10,000. Describe straight line, double declining balance and sum-of-the-years digits depreciation methods.