Trig problem using bearings

Suppose that you are Torpedo Officer aboard the U.S.S. Skipjack. Your submarine is conducting torpedo practice off the coast of Florida. The target is 7200 m from you on a bearing of 276 degrees and is steaming on a course of 68 degrees. You have long-range torpedoes that will go 6400 m, and short-range torpedoes that will go 3200 m. Between what two bearings can you fire torpedoes that will reach the target's path if you use:

a. long-range torpedoes

b. short-range torpedoes

i have no idea what i am doing with this one.....lots of steps would be greatly appreciated :):):)