I have some math problems in Finance 1000, Plz help me, thank you !!

1. abby won $11500 in the lottery. she wants to use some of the winings as a down payment for a home. she will be ready to purchase a home in 10 years. how much of her winnings should she deposit today at 6.2% interest, compounded monthly to ensure that she has $20000 when she is ready to buy a home?

2.casey can spend $350 a month on a car payment. the dealer will give him $5000 for the trade in value of his current car. the credit union is offering him a car loan at 4% for three years. how much can casey spend on a new car?

3. charlie wants to retire in 25 years. he rencently changed jobs and started saving in a new retirement plan. he rolled over his IRA from the previous job with a balance of $17000 into an account that earns an average of 8% annually. he begins a new 401K account deposing $250 monthly into the account , which earns 9% compunded monthly. how much will have in the IRA account in 25 years?

4. using the information in the previous question about charlie's two retirement account, calculate how much money he will have for retirement in 25 years.