Sally has a weighted coin that lands on heads with probability q (and thus lands on tails with probability 1 - q). Suppose Sally performs an experiment where she flips the coin until it lands on heads twice (not necessarily consecutively). Let X be the number of times Sally Alips tails before the first head. Let Y be the number of times she flips tails after the first head. For example, if Sally Alips TTHTTTTTH, then X = 2 and Y= 5