1. Suppose that 25% of people have a dog, 29% of people have a cat and 12 96 of people own both. What is the probability that someone owns a dog or a cat? 2. Face book reports that 86% of its users are from outside of North America. Of the North American users, twothirds log on every day. Ofthe nonNorth American users, threesevenths log on every day. Draw a tree diagram forthis situation. Why is the tree better than the table in this case? Where the joint probabilities found? 3. Given the probability in Question2, what is the probability that a person is from North America given that he logs on to Face book every day? Has the probability that he is from North America increased ordecreased with the additional information