1. Find the present value of a 30-year annuity-due with semiannual payments in which the first payment is $20,000, the second payment is $21,600, the third payment is $23,328, the fourth payment is $25,194.24, etc., assuming an annual effective rate of interest of 16%.

2. Find the present value of a varying perpetuity-DUE in which payments are made every two years with the first payment being $245, and each payment thereafter is $150 larger than the previous payment. Assume the annual effective rate of interest is 5%.

pls show all work written out without rounding until the last step