a) What is the ERR for this project? Assume that MARR = 15% per year. Is this project considered to be profitable? (12 points) Investment cost $15,000 Expected life 7 years Market (salvage) -$1,500 Annual receipts $8,750 Annual expenses $3,550 a A negative market value means that there is a net cost to dispose of an asset. b) What is the discounted payback period? (8 points)