Company L's stock returns in the last seven years are as follows: 10%, 8%, 6%, 4%, -5%, -3% and 11%. What is the geometric mean of the returns?

Janice Inc. stock's is currently trading at $60 and expected to rise to $66 at the end of the year. Its standard deviation is estimated at 6.4%. If the returns are assumed to be normally distributed, what is the expected range of prices to prevail at the end of the year, at 95% level of confidence (z=1.96)?