The file nameExam_2.xlsx, sheet namedPart 2is kept blank. UsePart 2sheet to answer this question. Put a box around your answers. For (a) and (b), round your answers to 4 decimal places.

A survey conducted for the Northwestern National Life Insurance Company revealed that 70% of American workers say job stress caused frequent health problems. Suppose a random sample of 10 American workers is selected.

1. What is the probability that more than seven of them say job stress caused frequent health problems?
2. What is the probability that exactly five say job stress caused frequent health problems?
3. What is the expected [mean] number of workers that would say job stress caused frequent health problems?

[Hint: Use binomial distribution to answer question 2]