It took 26 minutes for Usain the snail to reach the juicy rain drop that he discovered 37 centimeters
from his home. Unfortunately, as soon as he reached the raindrop he was frightened by an aggressive
caterpillar so he immediately turned back. He was tired, so after his second 26 minutes he is
only half way home. Hint: Speed is always nonnegative but velocity can be negative if the movement is backward.

What is his average velocity?

What is his average speed?

You can earn partial credit on this problem.