4.7 The lease cost for a specialized highway design software package is estimated to be $13,000 for each of years 1,2 , and 3 (future dollars). (a) Calculate the CV amount today (year 0 ) of each future cost estimate at the inflation rate of 6% per year. (b) Develop a spreadsheet and graph for inflation rates of 3%,6%, and 8% per year that show the CV today