Eve brown is trying to save for her retirement. she believes she can earn 12% on average each year on her retirement fund. assume that at the beginning of each of the next 40 years, eve will allocate x dollars to her retirement fund. if at the beginning of a year eve has y dollar in her fund, by the end of the year, it will grow to 1.12y dollars. a. using excel, develop a spreadsheet model to find out how much Eve should allocate to her retirement fund each year to ensure that she will have $1 million at the end of 40 years. b. are there any key factors that are being ignored in our analysis of amount saved for retirement