Larry leaves home at 12:09 and runs at a constant speed to the lamppost. He reaches the lamppost at 12:11, immediately turns, and runs to the tree. Larry arrives at the tree at 12:27. What is Larry's average velocity during his trip from home to the lamppost, if the lamppost is 389.0 m west of home, and the tree is 620.0 m east of home?
What is the average velocity for Larry's entire run?