can you help me answer this using excel?

My daughter wants to buy a new car. Here are the parameters. The car cost $12,000 with terms of 5% APR over five years. She has $3000 saved up and is ready to put down on the loan. 1. What is the actual annual percentage rate she will be charged if she pays all of the $3000 as a down payment for the five years? What will her monthly payments be? 2. Would it be better (cheaper) for her to pay $1000 down now, borrowing the rest, but in 1 year pay the other $2000 put towards principal? How will this affect the loan