3. In 1880, five aboriginal trackers were each promised the equivalent of $100 Australian dollars for helping to capture the notorious outlaw Ned Kelly. In 1993, the grand daughters of two of the trackers claimed that this reward had not been paid. The Victorian prime minister stated that if this was true, the government would be happy to pay the $100. However, the granddaughters also claimed that they were entitled to compound interest. How much was each entitled to if the interest rate was 5 percent? What if it was 10 percent? 4. Would you rather receive $1,000 a year for 10 years or $800 a year for 15 years if: a. The interest rate is 5 percent b. The interest rate is 20 percent C. Why do your answers to (a) and (b) differ? 5. Suppose you want to buy a new house. You currently have $15,000 and you figure you need to have a 10% down payment. If the type of house you want costs about $200,000 and you can earn 7.5% per year, how long will it be before you have enough money for the down payment