Over the past 40 years, the smallest firms(1st decile) had an average monthly return of 0.90% and a beta of 1.2. The largest firms (10 th decile) had an average return of 1.33% and a beta of 1.5. During the same time period, the T bill rate averaged 0.51% and the market risk premium was 0.48%. Are the returns consistent with the CAPM? Provide details of all the workings, and interpret the results.