Medical records from pediatric hospitals suggest that newborn babies' average birth weight is at least 7 pounds. To test this claim, researchers collected the birth weight of a random sample of newborn babies. The sample size was 50, the mean of the sample was 5.9 pounds and the standard deviation was 0.2 pounds. At alpha =0.10, test if the sample can reject the null hypothesis. Write the null and alternate hypotheses for a and b. a. What happens if alpha=0.05? (2 points)

b. What happens if the sample size was 10 instead of 50? (2 points)