How long will it take money to triple if it is invested at the following rates? (A) 3.9% compounded weekly (B) 11.7% compounded weekly (A) years (Round to two decimal places as needed.) Find i (the rate per period) and n (the number of periods) for the following annuity. Annual deposits of $2,100 are made for 13 years into an annuity that pays 8.75% compounded annually. i= (Type an integer or a decimal.)