1. What is the maturity value of your $7,800 investment after three years if the interest rate was 5% compounded semi annually for the first two years, 6% compounded quarterly for the last year, and 2 years after the initial investment you made a deposit of $1,200? How much interest is earned?

2. Darwin is a young entrepreneur trying to keep his business afloat. He has missed two payments to a creditor. The first was for $3,485 seven months ago and the second was for $5,320 last month. Darwin has had discussions with his creditor, who is willing to accept $4,000 one month from now and a second payment in full six months from now. If the agreed upon interest rate is 7.35% compounded monthly, what is the amount of the second payment?

3. GenX Holdings received an invoice from its supplier that indicates the penalty on overdue invoices will be charged at a rate of 3.4% per month. What effective rate of interest is being charged on overdue invoices?