Write a program to calculate the pdf and cdf of the hypergeometric, binomial and geometric distributions

Your program should have a facility to

• Request distribution.
• Request parameters.
• Request pdf or cdf.

Make sure your code contains

• validity checks, e.g.
  • sample size n >0;
  • 0 <= probability <= 1;
  • 0 <= x < = n.
• probabilities rounded to two decimal places.