Suppose that Shen is a diligent hard-working fourth-year college student. One Wednesday, he decides to start the day by working through 250 practice problems to study for the informatics class. Using a table to track his progress throughout the day, he notices that as the hours pass, it takes him longer to solve the problems. Time Total Problems Solved 7:00 AM 0 8:00 AM 100 9:00 AM 175 10:00 AM 225 11:00 AM 250 Use the table to answer the following questions. The marginal, or additional, gain from Malika's first hour spent working, from 7:00 AM to 8:00 AM, is problems. The marginal gain from Malika's third hour spent working, from 9:00 AM to 10:00 AM, is problems