More word problems... Help please!

1. Kristi invests $1500 at a 7.25% annual simple interest rate, and her sister Kari invests $2000 at a 6.75% annual simple interest rate. Which of the two will earn the greater amount of interest after one year? How much greater?

2. A $5000 investment at an annual simple interest rate of 5.2% earned as much interest after one year as another investment in an account that earned 6.5% annual simple interest. How much was invested at 6.5%?