State whether each of the following is a Uniform Random Variable, Binomial Random Variable, Hypergeometric Random Variable, or none of the above. Create the probability distribution for each one, either as a formula or as a table.

a) Two numbers from 1 to 3 are randomly picked and their difference is recorded. It is possible to select the same number.

b) A particular class contains 17 grade elevens and 4 grade twelves. A group of three people are selected from the class and the number of grade twelves selected is recorded.

c) A random number is selected from 2 to 7

d) One of five stickers is randomly placed in a cereal box. A random variable

records the number of "Sticker A" collected when 4 cereal boxes are purchased