I'm stuck on number 6! Help!

Toby invested £7500 for 2 years in a saving account. He was paid 4% per annum compound interest. How much money did Toby have in his savings account at the end of 2 years?

Im stuck on number 6 Help Toby invested 7500 for 2 years in a saving account He was paid 4 per annum compound interest How much money did Toby have in his savin class=