Simone is a hard-working college junior. one tuesday, she decides to work nonstop until she has answered 200 practice problems for her chemistry course. she starts work at 8: 00 am and uses a table to keep track of her progress throughout the day. she notices that as she gets tired, it takes her longer to solve each problem. timetotal problems answered8: 00 am 09: 00 am 8010: 00 am 14011: 00 am 180noon 200use the table to answer the following questions. the marginal, or additional, gain from simone's second hour of work, from 9: 00 am to 10: 00 am, is problems. the marginal gain from simone's fourth hour of work, from 11: 00 am to noon, is problems. later, the teaching assistant in simone's chemistry course gives her some advice. "based on past experience," the teaching assistant says, "working on 70 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 her 4 hours of study time to get the best exam score possible, how many hours should she have spent working on problems, and how many should she have spent reading?