A variable is normally distributed with mean 10 and standard deviation 3.
a. Determine and interpret the quartiles of the variable.
b. Obtain and interpret the seventh decile.
c. Find the value that 35% of all possible values of the variable exceed.
d. Find the two values that divide the area under the corresponding normal curve into a middle area of 0.99 and two outside areas of 0.005. Interpret your answer.