Eliana is training for a race in San Francisco, so she has a new running route that includes running up and down a steep hill. Data from her last training run is shown in the table at right.

1. During which $10$-minute interval did Eliana run the fastest? The slowest? Justify your answers.

   Hint (a):

   During which $10$-minute intervals does Eliana run the greatest distance and the least distance?

2. What was Eliana’s average speed during the last $10$ minutes of her run? Show your work and include units.

   Hint (b):

   Find the total distance traveled in the final $10$ minutes and divide that by $10$. Your answer should be in miles/minute.