I need help with this problem !!!!!!!!   My brain is turning to mashed patato's  Thank-You

  In a study on infants, one of the characteristics measured was head circumfrence. The mean head circumference of 15 infants was 34.6 centimeters (cm).

The data in the table represents the ages of the winners of an award for the past five years. Use the data to answer questions (D) and  (E)

39     40

-------------

48     48

-------------

42

A population has a mean of 75 and a standard deviation equal to 21. Find the mean and standard deviation of a sampling distribution of a sample means with a sample size of 49.