please help me solve this

1. In your own words, answer the following questions in 2-3 sentences a. What is the Bertrand Paradox? Explain why we get this result and how we can improve our model of price competition to solve this problem (5 pts) b. Explain the problem of double marginalization and list at least two ways that firms along the supply chain can get around this problem (5 pts) c. In sequential games, is it always better to move first? If your answer is yes, briefly explain why. If your answer is no, give an example and explain why moving second is better than moving first. (5 pts)