Q4) A stock has an expected return of 15.97% and a standard deviation of 10.30%. For this stock, what are the: a) Upper range of 68% confindence interval ( 0.5 points) b) Lower range of 68% confindence interval: ( 0.5 points) c) 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)