1. The problem statement, all variables and given/known data I'm doing my best to figure out how these answers were worked out. We discussed it as a class but then moved on to another topic and after that, I just lost it because of the topic I'm doing right now. I basically need to explain how these answers can be worked out. 2. Relevant equations I have a screenshot of the powerpoint slide which was used and we were asked to calculate the answer. How would the answers be calculated? 3. The attempt at a solution I have had an attempt at it and I was fairly good at this but once we started a new topic, I just lost all knowledge of it. Please explain how I can work out the answers again. Thanks!