Find the accumulated value of $1,000 at the end of the fourth year

(a) if the simple discount rate is 6% per annum, (b) if the simple interest rate is 6% per annum, (c) if the effective rate of interest is 6% per annum, (d) if the annual nominal interest rate is 6% payable quarterly, (e) if the annual nominal discount rate is 6% compounded monthly, (f) if the constant force of interest is 6% per annum.