I need someone to HELP me solve these TWO problems I am having a HARD time getting the answer. Problem (4-3) and Problem (4-4)

PROVIDE ME WITH DETAILS FOR EACH PROBLEM

on how you get the answer because I am not that good with math.

CHAPTER 4 SECURITIES MARKETS AND MARKET INDEXES 4-3 Assume that you have a stock currently priced at $56 that moves exactly proportional to the S&P 500 Index. Over a six-month period the index moves from 1,110 to 1,243.20. What should the price of your stock be? 4-4 Assume that an international index is at 10,000. Some people are predicting that this index could lose 50% because of the economy's difficulties. If that were to happen, what percentage rate of return would be necessary to restore the index to its former level? 4-5 The 52-week low for the NASDAQ index occurred on 9/4/09 at 1982.05, while the 52-week high occurred on 4/26/10 at 2,535.28. For the DJIA, the dates are the same, and the comparable numbers are 9,302.28 and 11,308.95. Which market performed better during that time period