Can anyone finish question 4 and explain? thanks

4) Analytical Murphy's Auto Co. purchased a large piece of equipment on Ja.uary 1, 2007. The equipment is being depreciated, using the straight-line method, at the rate of $16,000 per year. On January 5, 2018, the book value of the machine was $190,000. (a) What was the original cost of the machine? (b) What will the book value be on December 31, 2019