A variable is normally distributed with mean 15 and standard deviation 4. a. Find the percentage of all possible values of the variable that lie between 7 and 22. b. Find the percentage of all possible values of the variable that exceed 9. c. Find the percentage of all possible values of the variable that are less than 5. Click here to view page 1 of the standard normal table. Click here to view page 2 of the standard normal table. a. The percentage of all possible values of the variable that lie between 7 and 22 is . (Round to two decimal places as needed.) b. The percentage of all possible values of the variable that exceed 9 is %. 'Round to two decimal places as needed.) c. The percentage of all possible values of the variable that are less than 5 is (Round to two decimal places as needed.)