Been at these for hours, please help

Problem 3.4 (15 pts) Sandy purchases a perpetuity-immediate that makes annual pay- ments. The first payment is 100, and each payment thereafter increases by 10. Danny purchases a perpetuity-due which makes annual payments of 180. Using the same effective interest rate, i > 0, the present value of both perpetuities are equal. Calculate i. a Problem 3.5 (15 pts) The first payment of a perpetuity-immediate is 60. Subsequent pay- ments decrease by 1 per year until they reach a level of k. Payments remain constant at k thereafter. The present value of the perpetuity is equal to the present value of a perpetuity- immediate paying 44 each year. The annual effective interest rate is 5%. Calculate k