The famous pirate Billy Bones is trapped on a Caribbean island with a long, straight coast. He sees his ship at anchor, 2 km out to sea from a point 5 km down the beach. The navy is chasing him and so he needs to get back to his ship as quickly as possible to sail away. ? Billy can run at a speed of 7 km/h and swim at a speed of 3 km/h. He can choose to jump straight into the water and swim directly to the ship, or to run down the beach some distance and then swim the rest of the way. How far (if at all) should Billy run before he starts swimming, and how long will it take him to get to his ship, in hours and minutes?​