You are considering an investment in a bank account that pays an interest rate of 18% p.a. compounded monthly. You decide to invest $796.30 at the end of each six months and would like your account to grow to $38,000. You want to find out how many semi-annual payments you need to contribute. Answer the following questions, and choose the closest answer from the possible choices following each question:

1. Which TVM variable in the financial calculator should be set equal to zero when solving for the number of payments?

2. How many semi-annual payments would it require for your account to grow to $38,000?