A boat sailed a distance of 18 kilometers due south. It then banked to the left and sailed the second leg of the journey. Finally, it banked left again and sailed back to the starting point. The entire course was shaped like a right triangle with the 18-kilometer distance serving as the hypotenuse. The second leg of the journey was 5 kilometers longer than the final leg. How long were the second and third legs of the journey? Round your answers to the nearest hundredth of a kilometer, if necessary.