20. The weight of US females who are 20 or older has a mean of 170.3 pounds and a standard deviation of 41.63 pounds. Round probabilities to four decimal places and means to two decimal places.

d. Find the probability that the mean weight in a sample of 48 US females who are 20 or older is between 175 and 185 pounds.

e. Between what two mean weights in a sample of 48 US females who are 20 or older do the middle 10% of all sample means fall?

f. Below what mean weight in a sample of 48 US females who are 20 or older does the lowest 60% of all sample means fall?