Q8) A stock has an expected return of 9.89% and a standard deviation of 13.23%. Compute the following for this stock: a) Upper range of 68% confidence interval : (0.5 points) b) Lower range of 68% confindence interval : (0.5 points) e) Upper range of 95% confindence interval : (0.5 points) d) Lower range of 95% confindence interval : (0.5 points) e) Upper range of 99% confindence interval : (0.5 points) f) Lower range of 99% confindence interval : (0.5 points)