A group of 5 people wanted to throw a party that started around 1 o’clock. One person had to leave to pick up food. By 2 pm 4 more people showed up. At 3 o’clock only one person came to check out the party. An hour he decided the party was lame so he left. Two people noticed him leaving and realized the party was boring and decided to leave at 5 pm and said they had other plans.
(0,5) (1,4) (2,8) (3,9) (4,8) (5,6)