these 3 questions please:)

Use the information below to answer the questions that follow. Enter your answers using digits only - no dollar signs, commas, or decimal points. The business's year-end is December 31 . Cost of equipment =255000 Useful life in years =10 Residual value =21000 Date purchased = July 1 What is the depreciation expense per year? What is the depreciation expense per month? What is the depreciation expense in the year of purchase