Financial Literacy PLEASE HELP (probably easy)

1. A $1200 loan for 7 months at 5% simple interest.
2. An $8000 loan for 4 years at 12.5% simple interest.
3. A $500 loan for 99 days at 10% simple interest.
4. A $750 loan for 15 weeks at 13.25% simple interest

NOTE: they all have different amounts of time which is why I need help with each!