A ship steams due east at 24km/h. A submarine 4.0 km away fires a torpedo which has a speed of 50km/h.

A ship steams due east at 24km/h. A submarine 4.0 km away fires a torpedo which has a speed of 50km/h. If the bearing of the ship as seen from the submarine is N20E, in what direction should the torpedo be fired to hit the ship? How long will it take for the torpedo to reach the ship?