Today, Sean left home at 8 a. m drove to work, and worked 9 a. m. until 5 p. m. On the drive back home, Sean got stuck in slow-moving traffic for 2 hours, then stopped to have dinner, and finally got home at 9:30 p. m. The graph below shows Sean's distance, d, from his home (in kilometers) as a function of the time, t (in hours). Sean's workplace is located ___ km from his home Sean's speed when he was driving to work was ___ km/h Sean's speed between 5 p. m and 7 p. m was ___ km/h