(10 marks) Chandrika has an annuity paying $2,466.72 at the end of each week for 10 years. The interest rate is a = 9.700%. a) What is the effective interest rate per payment period? b) What is the present value of her annuity? c) Chandrika chooses to receive semi-annual payments instead (still at the end of each period). The nominal interest rate pe and the present value don't change. What is the amount of her semi-annual payments PLEASE SHOW ALL WORKS FOR EACH PART... THANK YOU