Hi could you please solve this questions I am a bit stuck

Question 3 10 pts 3. George bought a piece of equivalent for $75,000. The equipment has a useful life of 10 years and a salvage value of $9.000 at the end of its useful life. Assume that the annual interest rate is 9%, and SOYD depreciation is used. (a) (10 pts) Compute the book value at the end of year 7. O $15,000 O $21,000 $16.200 O $19.800 Question 4 10 pts (b) (10 pts) Calculate the present value of depreciation. O $39.510 $47.770 O $44,410 O $36.200