Final answer:
The total distance walked is 22 meters, the displacement is zero, average speed is 3.67 meters per second, and average velocity is zero.
Step-by-step explanation:
When you walk 11 meters north and then 11 meters south, the total distance you have walked is the sum of both these distances, which is 22 meters. The final displacement, however, is zero because you returned to your original starting position. Displacement is a vector because it has both magnitude and direction, and in this case, it indicates a change in position.
The average speed is the total distance traveled divided by the elapsed time. So, your average speed for this walk is 22 meters divided by 6 seconds, which equals approximately 3.67 meters per second. Since displacement is zero, the average velocity is also zero, because average velocity is displacement divided by the elapsed time, and any number divided by zero is undefined.