What are the steps to solving a question like this? I'm confused about the phrase "With this amount growing at 6% p.a" does this just mean the $5000 or the total in the investment account. I don't have a finance calculator so I'll need to use a normal Casio.

Your friend already has $20,000 in an investment account. In addition to this amount, she is considering investing $5,000 at the end of year 1 with this amount growing at 6% p.a. until the end of year 5. If the interest rate earned by the investment account is expected to be 8% p.a., the total amount she will have accumulated in this account at the end of five years is closest to: $29,387 $32,776. $62,162. $66,120