Gus wants to save $15,000 for a down payment on a house. If his deposits 'can earn 8%, compounded monthly, approximately how many years will it take Gus to reach his goal? He can make a deposit of $250 per month. a) 4.2 years Ob) It's an unreachable goal in his lifetime. Oc) 20 years d) 5 years O e) 50.6 years