An island is 1.8 mi1.8 mi due north of its closest point on a straight shoreline. A visitor staying at a cabin on the shore that is 4.8 mi4.8 mi from that point. The visitor is planning to go from the cabin to the island. Suppose that the visitor runs at a rate of 6 mph6 mph and swims at a rate of 1 mph1 mph. How far should the visitor run before swimming to minimize the time it takes to reach the island