I. Answer both parts of this question.
	a. If you invest $1000 a year at the end of each year for the next twenty-six years in a broadly-based stock market fund which
	historically has earned 7% per year, how much will you expect have at the end of these 26 years if you believe stock
	market history is an excellent guide to the future?
	b. If instead you invest $1000 a year at the beginning of each year for the next twenty-six years in the same fund, how
	much would you have at the end of those twenty-six years?