### Calculating joint pmf, conditional pmf, finding covariance

1) suppose that you repeatedly toss a coin whoes probability of head is p. Let X denote the number of tosses needed to get the first head and Y denote the number of tosses needed to get the second toss. a) Find the joint pmf of X and Y. b) Find the conditional pmf of Y given X=x. c) Are X and Y independent? d) (Bonus) Find