Hi and welcome back. I hope you enjoyed the first lesson and walked away with an understanding of how reinforcement learning is used in industry today. So far, we’ve started a conversation to illustrate the diverse potential of reinforcement learning techniques. In this lesson, we’ll continue the conversation and end with a rigorous definition for the reinforcement learning problem. Specifically, you’ll learn how to take a real world problem and formulate it so it can be solved through reinforcement learning.