Compute each part of following problem given below:
Problem: Near the end of a marathon race, the first two runners are separated by a distance of 65.0 m. The front runner has a velocity of 3.25 m/s, and the second a velocity of 4.75 m/s.
Part A: What is the magnitude of the velocity of the second runner relative to the first?
Part B: If the front runner is 215 m from the finish line, who will win the race, assuming they run at constant velocity?
Part C: By what distance does the winning runner finish ahead of the next runner?
If possible just a brief explanation how you got the answer for above problem?