Decide whether you can use a normal distribution to approximate the binomial distribution. If you can, use the normal distribution to approximate the indicated probabilities and sketch their graphs. If you cannot, explain why and use a binomial distribution to find the indicated probabilities.

24. Internet Use A survey of U.S. adults ages 50-64 found that 70% use the Internet. You randomly select 80 adults ages 50-64 and ask them if they use the Internet. (Source: Pew Research Comer) (a) . Find the probability that at least 70 people say they use the Internet. (b) Find the probability that exactly 50 people say they use the Internet. (c) Find the probability that more than 60 people say they use the Internet. (d) Are any of the probabilities in parts (a)-(c) unusual? Explain