<image> During the holidays, Mingming and his father drove to the zoo. On the way, Mingming plotted the car's speed versus time. As shown in the figure:
(1) How long did the car travel? What is its maximum speed?
(2) During which time interval did the car maintain a constant speed? What was the speed?
(3) What might have happened during the time period from 8 minutes to 10 minutes after departure?
(4) Describe the car's travel situation in your own words.