A hiker walking at a constant rate of 4 miles per hour is passed by a cyclist traveling in the same direction along the same path at a constant rate of 20 miles per hour. The cyclist stops to wait for the hiker 5 minutes after passing her, while the hiker continues to walk at her constant rate.
How many minutes must the cyclist wait until the hiker catches up? A 6又2/3 B 15 C 20 D 25 E 26又2/3