Stock market

Stock market in France had a mean of -17.0% in 2011. Assume that the returns for stocks on the French stock market were distributed as a normal random variable, with a mean of -17.0 and a std. deviation of 10. If you select an individual stock from this population, what is the probability that it would have a return a. less than 0-that is a loss? b. between -10 and -20? c. greater than -5? If you selected a random stock of 4 stocks from this population, what is the probability that the sample would have a mean return d. less than 0-that is a loss? e. between -10 and -20? f. greater than -5? g. Compare your results in parts (d) thru (f) to those in (a) through (c).