The present values of the following three annuities are equal: (i) perpetuity-immediate paying 1 each year, calculated at an annual effective interest rate of 10.61%. (ii) 30-year annuity-immediate paying 1 each year, calculated at an annual effective interest rate of %. (iii) -year annuity-immediate paying 1 each year, calculated at an annual effective interest rate of (1)%. Calculate .