The length of time (in seconds) that a user views a page on a Web site before moving to another page is a lognormal random variable with parameters \theta=0.5 \text

{ and } w^{2}=1.69 a) What is the probability that a page is viewed for more than 10 seconds? b) By what length of time have 50% of the users moved to another page? c) What is the mean and standard deviation of the time until a user moves from the page?

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5