Items 1 ~ 4 use the following scenario: Data were collected on gender and happiness levels of a sample of students. A student is selected randomly from the sample summarized in the table. Label the item numbers.

	Very Happy	Pretty Happy	Not too Happy	Total
Male	42	51	12	105
Female	38	36	10	84
Total	80	87	22	189

1. Find the probability that the person is very happy or pretty happy. Show how you get the probability.
2. Find the probability that the person is female and not too happy. Show how you get the probability.
3. Find the probability of a pretty happy male. Show how you get the probability.
4. Consider these two events: selecting a female and selecting someone who is very happy. Are these two events mutually exclusive? Why or why not?