Using Matlab: Create a Stem and Stair plot for the matlab probability mass function (pmf) and the matlab cumulative distribution function (cdf) (Statistics) for the sum of the roll of two 3-sided dice subtracted by the roll of a third 3-sided dice. The plots are to be generated using experimental modeling for the definition of the random variable X.

As an example for the expected results, the stem and stair plots for a typical random variable analysis are shown below