Pet owners often have more than one type of pet. A recent survey shows that 70% own a dog, 44% own a cat, and 30% own both a dog and cat. Suppose a person is randomly selected. Determine the probability this person

1(2). has a dog or a cat.

2(2). does not have a dog nor a cat.

3(2). only has a dog.

4(2). Given the person has a dog, what is the probability that this person has a cat?