Please help. been stuck on this question for ages.

Noah opens a savings account which gives compound interest of
2.5% per year. He puts £4000 into it.
a) How much money will Noah have in the account after 9 yrs?

b) How much interest will Noah have earned from this account
after 9 years?

Give your answers in pounds (£) to the nearest 1p.

Please help been stuck on this question for ages Noah opens a savings account which gives compound interest of 25 per year He puts 4000 into it a How much money class=