4. What if instead of saving for someone else, you expect to live until you are 90 years old at which point you plan to have no money left at all. Ifyou can earn 5% per year, how much must you have 90? saved up at 60 to earn a 70% of your pre-retirement salary of $241,345.13 each year until you are 5. Assuming the latter scenario (you plan to leave nothing to your heirs-question #4), how much of the principle amount of money that you saved do you still have left after 5 years? HINT: Treat this like an amortizing loan. The amount that you saved is like the loan amount and the payments are the amount that you use each year to spend on expenses