Next weekend you will be participating in a 12 km cross country trail race on Table Mountain.The average time between two successive wild animal sightings on the mountain is reported to be 5 minutes.

a)What is the probability that you see at least one wild animal during the 11th minute of
the race given that you will see 3 wild animals since the start of the race?

b)What is the probability that it will take more than a quarter of an hour before you see a
wild animal after ten minutes of running?