1.We intend to pay 1,500 won per year for 10 years in equal amounts for 5, 10, and 15 years, respectively. If the interest rate is 12%, what is this equal payment?

2.There are people who want to retire after 30 years. This person needs 5 million won in living expenses every year for 20 years after retirement. In order to raise this living expenses, how much should I deposit every three months for the next 30 years? Interest is 8% compounded in the fourth quarter. However, assume that living expenses are necessary from the end of 31.