A random variable has normal distribution mean 40 and standard deviation 4. Show how you would do the following with R code.

a) Determine and interpret the quartiles of this variable.

b) Find the value that 96% of all possible values of this variable exceed.

c) Find the two values that divide the area under the corresponding normal curve into a middle area of 0.88 and two outside areas of 0.06. Interpret your answer.