Please show how to solve in simplest way with work [multi part question]

Alan places $100 into an account each month for 25 years. He earns 6% compounded monthly. How much will he have at the end of 25 years? Solution: $69,299.39 Sarah is placing $500 each quarter into a special savings account which earns 6% compounded quarterly. When she reaches $10,000 in the account, she will use the money for a down payment on a new car. How long will it be before Sarah has accumulated $10,000? Solution: 17.621 quarters or4.40545 years or 4 years 148 days