1.The winner of a raffle can choose to receive 10 million immediately or receive 30 semi-annual payments; the first of them is received immediately. Which will be the value of the semi-annual payment if the money is invested at 12% per year?

2.How many bimonthly advance deposits of $5,000 each are due? making to accumulate an amount of $185,488.33? The interest rate is 20% annual capitalized every two months.