A building with a cost of $708,750 has an estimated residual value of $141,750, 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? Do not round intermediate calculations. $fill in the blank 1

b. What is the book value at the end of the fifteenth year of use? $fill in the blank 2

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 $33,750, what is the depreciation expense for each of the remaining 15 years?