A man has two investments, one paying 3% annual interest and the other 4%. The total annual income from the investments is $17,000. If the interest rates were interchanged, the total annual income...

A man has two investments, one paying 3% annual interest and the other 4%. The total annual income from the investments is $17,000. If the interest rates were interchanged, the total annual income would be $18,000. Determine the following:

1. The amount of each investment.


2. Explain the concepts/principles that were considered and the factors that affected the condition of item (a)