Type or paste question here

1. A man has a loan of 50,000 in a bank that gives an interest rate of 12% compounded quarterly? If he plans to pay after 6months, how much is the interest?

2. A man has a loan of 50,000 in a bank that gives an interest rate of 12% compounded quarterly? If he plans to pay after 6months, what is n?

3. A man has a loan of 50,000 in a bank that gives 12% simple interest. If he plans to pay after 6months, what is r (in decimal form)?

4. A man has a loan of 50,000 in a bank that gives an interest rate of 12% compounded quarterly. How much will he pay quarterly for 5 years if he start paying on the day of his loan?

5. A man has a loan of 50,000 in a bank that gives 12% simple interest. How much is the interest if he plans to pay after 5 years?