Problem 5.21 contains a plot of inflation as a function of stock market returns. You believe that when inflation is low, typically stock market returns are higher. Using Excel, fit a linear regression model for your CER for inflation as a function of stock market return. On the basis of R2 and a plot of the data, is a linear model appropriate? Develop a plot with the trend line, regression equation, R2, and the data. Ensure that the axes are labeled and the plot appropriately titled.