Larry recorded his time as he ran. What was his average speed from hour 2 to hour 4?

Options: 6.75mph, 7mph, 13.5mph, and 14mph

What was his average speed from hour 4 to hour 7?

Options: 5mph, 7mph, 9.7mph, and 21 mph

Did he speed up or slow down?
Options: sped up, slowed down, or stayed the same