Despite his relative youth, Samuel Hunter has started planning for his retirement. At present, he has $6,100 he can invest, and he believes that he will be able to invest that amount each year for the next 39 years -40 contributions in total. Round answers to the nearest whole number. a. If his investment earns 4% per year for the 40 years, how much will Samuel have accumulated at the end of 40 years? $ b. If Samuel delays investing for 10 years, how will that affect the balance accumulated at the end of 40 years? $ c. If Samuel begins investing now and finds an investment earning 5% per year for 40 years, how much more will he have accumulated than if he earns 4%