In a certain population, 38% of people have type O positive blood. Suppose 20 random people have their blood type determined. Using Excel, determine the following: 1. The average number of people in this group expected to have O positive blood. 2. The probability that exactly 9 people have O positive blood. 3. The probability that at most 4 people have O positive blood. 4. The probability that more than 15 people have O positive blood. 5. The probability that between 8 and 16 people, inclusive, have O positive blood