Question 3 - A-Level Maths

A robot is programmed to build cars on a production line. The robot breaks down at random at a rate of once every 20 hours.
1. Find the probability that it will work continuously for 5 hours without a breakdown.
Find the probability that, in an 8 hour period,
the robot will break down at least once,
there are exactly 2 breakdowns. In a particular 8 hour period, the robot broke down twice.
Write down the probability that the robot will break down in the following 8 hour period. Give a reason for your answer.