Specify the distribution and parameters of the random variable in each of the following scenarios.

a. You practise shooting a ball through a net. You succeed with probability p on each attempt, independently of other attempts. Define X to be the number of misses before you score ten hits.

b. You record your score over 20 attempts. Define Y to be the number of hits in these 20 attempts.

c. You practise every day, with independent outcomes each day. You want to get to the point where you achieve 5 hits in the first 5 attempts of a day. Define Z to be the number of days you fail before the day you finally achieve this goal.