Number of customer in the store during a day follows Normal distribution with mean M and standard deviation . Find probability that number of customer during a day will be:

1. less than x1 P(x < x1) 2. greater than x2 P(x > x2) 3. between x1 and x2 P(x1 < x < x2)

For M, , x1, x2 use numbers assigned for you in the table below.

M=20

=6

x1=17

x2=26