A textile producer has established that a spinning machine stops randomly due to

thread breakages, at an average of 5 stoppages per hour.

i)

What is the probability that in a given hour 3 stoppages occur on the spinning

machine?

ii)

Find the probability that at most 2 stoppages will occur in a given hour.

iii) Find the probability that more than 4 stoppages will occur in a given hour.