Please help answer both parts of the problem.

Part 1. Tomasz purchased a new heating and air-conditioning system for his home and financed $6,700 at an annual interest rate of 4.2% compounded monthly for 3 years. What are Tomasz's monthly payments (in dollars)? (Round your answer to the nearest cent.)

Part 2. Tomas purchased a new heating and air-conditioning system for his home and financed $9,100 at an annual interest rate of 2.2% compounded monthly for 3 years. How much interest (in dollars) will Tomasz pay over the term of the loan? (Round your answer to the nearest cent.)