Determine how much is in each account on the basis of the indicated compounding after the specified years have passed; P is the initial principal, and r is the annual rate given as a percent. (Round your answers to the nearest cent.) P = $3900 and r = 9%, compounded annually (a) after 4 years $ (b) after 10 years $ (c) after 16 years $ (d) after 25 years $