Please see the attachment.
The solution does an excellent job in describing the impact of certain events on the cost curves. The solutions goes into some amount of detail when it comes explaining the direction of the impact. However, it is still concise and easy to understand. In the second attachment, the solution draws the isoquant and isocost curves as well. Brief explanation to that is provided as well. This is an excellent response for students looking for concise answers to the problem being asked. Overall, a fair response.