I want a detailed explanation and solution please...

8. Mike deposits $100 into a bank account. His account is credited interest at a nominal rate of interest i(2) convertible semiannually. At the same time, Eric deposits 100 into a separate account. Eric's account is credited interest at a nominal rate of interest i(12) convertible monthly. After 10 years, the value of each account is 200 . Calculate i(2) and i(12)