Revision of Depreciation

A building with a cost of $675,000 has an estimated residual value of $270,000, has an estimated useful life of 27 years, and is depreciated by the straight-line method.

a. What is the amount of the annual depreciation? $

b. What is the book value at the end of the fifteenth year of use? $

c. If at the start of the sixteenth year it is estimated that the remaining life is 15 years and that the residual value is $195,000, what is the depreciation expense for each of the remaining 15 years? $