Yakov is a hard-working college senior. One Thursday, he decides to work nonstop until he has answered 88 practice problems for his math course. He starts work at 8:00 AM and uses a table to keep track of his progress throughout the day. He notices that as he gets tired, it takes him longer to solve each problem. Time Total Problems Answered 8:00 AM 9:00 AM 40 10:00 AM 64 11:00 AM 80 Noon 88 Use the table to answer the following questions. The marginal, or additional, gain from Yakov's first hour of work, from 8:00 AM to 9:00 AM, is problems. The marginal gain from Yakov's third hour of work, from 10:00 AM to 11:00 AM, is problems. Later, the teaching assistant for Yakov's math course gives him some advice. "Based on past experience," the teaching assistant says, "working on 20 problems raises a student's exam score by about the same amount as reading the textbook for 1 hour" For simplicity, assume students always cover the same number of pages during each hour they spend reading. Given this information, in order to use his 4 hours of study time to get the best exam score possible, how many hours should he spend working on problems and how many should he spend reading? O 0 hours working on problems, 4 hours reading 1 hour working on problems, 3 hours reading O 2 hours working on problems, 2 hours reading 3 hours working on problems, 1 hour reading 0 4 hours working on problems, 0 hours reading