Navigation: Two ships, Mer-Sea and Sea-Vous-Plait, leave port at the same time. Mer-Sea heads proceeds at 10 knots at 50°, while Sea-Vous-Plait travels 19° at 12 knots. After two hours of travel, Mer-Sea needs breaks down and needs assistance. At what course should Sea-Vous-Plait travel to reach Mer-Sea? At 12 knots, how long will it take for help to arrive?