Currently struggling on lecture problems, please explain thoroughly if possible, thank you!

Problem 1: Recall the "Binomial Random Variable" X ~ Binomial(n, p) is a random variable such that, supp(X ) = {0, 1, 2, 3, ..., n} and that the probabilities are given by, P(X = j) = 9 p (1 - p ) - j Use R to write your own script to sample from a Binomial(4, ?) distribution. Note, R already has a built-in feature that makes binomial sampling very easy. The purpose of this exercise is to first write your own such script