Imagine you leave the dock on a fishing boat that travels east for 30 kilometers when the captain realizes he left the fishing rods on the dock. It takes him 40 minutes to travel out against the current but only 20 minutes to return to the dock. In one paragraph, using your own words, calculate and explain your calculations for both the average speed and average velocity of the fishing boat in terms of kilometers per hour. Be sure to include proper spelling, grammar, and punctuation.