For a special annual perpetuity-due: (i) The first payment is 500. (ii) Each subsequent year payments decrease by 20 until a payment of 300 is paid. (iii) Payments remain level at 300 thereafter. Calculate the present value of this perpetuity at an annual effective interest rate of 6%. a. 6180 b. 6030 C. 6230 d. 5730 e. 5880