You and your friend race in a trail flag is 10 miles long. In each situation, does your friend pass you before the end of the trail? Justify your answer.
A- You have a four-mile head star and jog at 6 miles per hour. Your friend bikes at 8 miles per hour.
B- You have a five-mile head start and run at 7 miles per hour. Your friend bikes at 17 miles per hour.