Please help.

Management of Carla Vista Parts Company has decided to sell 10-vear bonds to finance expansion into the Pacific Northwest. The market rate on these bonds is 8 percent, and the 3 -month Treasury bill rate is 2.0 percent. The firm's credit rating is B, and the yield on 10 year Treasury bonds is 2.4 percent higher than that on 3 thonth Treasury bils. How much of a premium over the 10 -year Treasury bond will these Carla Vista Parts bonds sell for? Premium over the 10-year Treasury bond