Total time taken by the 4 relay runners all together = 3.86 minutes = (3 * 60) + 86 seconds = 180 + 86 seconds = 266 seconds As all 4 runners of the relay time take the same time to cover their individual laps, so Time taken by each runner = 266/4 seconds = 66.50 seconds So the total time taken by each runner of the relay team is 66.50 seconds. I hope this is the answer you were looking for.
because for the X axis you have 10 spaces, which is enough to fit 1 week per space (you only need 8). For the Y axis the best option is 150 because again you have 10 spaces and is enough to fit your numbers.