Consider the following:

You need a $300,000 financing package.

$150,000 at 9%, 30 Years

$100,000 at 8%, 20 Years

$50,000 at 7% 10 Years

1. What is the monthly payment for each part of the financing package?
2. What is the IRR on the $300,000 borrowed?

Does anybody know how to solve these two questions with details?