Calculate the equivalent future cost in year 10 for the following series of disbursements at an interest rate of 10% per year. also, write a single-cell spreadsheet function that will determine the future worth. year disbursement, $ year disbursement, $ 0 5 4000 1 4000 6 5000 2 4000 7 5000 3 4000 8 5000 4 4000 9 5000