Problem 3: How much money do you need to deposit in a bank account now so that you can withdraw $10,000 every 5 years forever if the interest rate is 5% per year, and the first withdrawal is scheduled 5 years from now? Problem 4: An investment of $80,000 is expected to generate a net annual income of $27,000 for 5 years. If the study period is 20 years, and assuming this alternative will be repeated over the study period, what is the present worth of this investment if MARR is 14%?

Problem 5: An investment of $74,000 yields a net annual income of $21,000 for 6 years. What is the internal rate of return (IRR) for this investment?