1.Data indicates that the time to download check$mart's home page is normally distributed with mean 7 seconds and standard deviation of 2 seconds.

a.what is the probability that the download time will be more than 9 seconds

b.what is the probability that the download time will be between 7 and 9 seconds

c.what is the probability that the download time is under 7second or over 9 seconds

d.what is the probability that the download time will be between 5 and 9 seconds

e.what is the probability that the download time is less than 3.5 seconds

f.How much time ( in seconds) will elapse before 10% of the download are complete.

g.What are the Upper Limit and Lower limit of X , located symmetrically around the mean, which include 95% of the download times