The U.S. Bureau of Labor Statistics released hourly wage figures for various countries for workers in the manufacturing sector. The hourly wage was $30.67 for Switzerland, $20.20 for Japan, and $23.82 for the U.S. Assume that in all three countries, the standard deviation of hourly labor rates is $4.00.

a.Suppose35manufacturing workers are selected randomly from across Switzerland and asked what their hourly wage is. What is the probability that the sample average will be between $30.00 and $31.00?

b.Suppose35manufacturing workers are selected randomly from across Japan. What is the probability that the sample average will exceed $21.00?

c.Suppose50manufacturing workers are selected randomly from across the United States. What is the probability that the sample average will be less than $22.90?