A variable is normally distributed with mean 7 and standard deviation 2. Find the percentage of all possible values of the variable that lie between…

A variable is normally distributed with mean 7 and standard deviation 2.

a. Find the percentage of all possible values of the variable that lie between 6and 10.

b. Find the percentage of all possible values of the variable that exceed 5.

c. Find the percentage of all possible values of the variable that are less than 3.