Hewlett-Packard has completed a study indicating that $50,000 in reduced maintenance this year (i.e., year zero) on one processing line resulted from improved wireless monitoring technology. a) If Hewlett-Packard considers these types of saving worth 20% per year, find the equivalent value of this result after 5 years. b) If the $500,000 maintenance saving occurs now, find its equivalent value 3 years earlier with interest at 20 % per year.