A stock has an expected return of 13.89% and a standard deviation of 09.11%. For this stock, what are the:

a) Upper range of 68% confindence interval

b) Lower range of 68% confindence interval:

c) Upper range of 95% confindence interval:

d) Lower range of 95% confindence interval:

e) Upper range of 99% confindence interval:

f) Lower range of 99% confindence interval: