Need help with number 7

Based on the following data for this GM $1,000. par value corporate bond: Company Coupon GM 8.7 Maturity 7/1/30 Last Price 120.17 Last Yield 6.2 Est... Spread 140 UST 5 6. What is the current yield of this bond to the nearest .1 percent a) 8.7 percent b) 8.2 percent c) 7.2 percent d) 6.1 percent e) 5.0 percent 7. What is the approximate yield to maturity of a five-year Treasury security? a) 7.2 percent b) 9.1 percent c) 7.6 percent d) 4.8 percent e) 6.2 percent