Only need help on 4, 8, and 9. Thank you!

(11 points) Vitamins in Milk ~ Milk is a good source of many vitamins that can help us stay healthy. Regulatory agencies in the US suggest that skim milk should be fortified with Vitamin A at the level of 600 micrograms per quart. A study in 2016 collected a sample of 33 skim milk bottles from a particular dairy and found the average vitamin A concentration was 605.9 micrograms per quart with a standard deviation of 12.4 micrograms per quart. A medical researcher wants to determine if the mean vitamin A concentration in skim milk from this dairy is different from 600 micrograms per quart. 1. Which set of hypotheses should be used for testing this claim? OA.H0:y=600vs.Ha:M>6OO B.H0:u=600vs.Ha:u#600 QC. Hazy =605.9 vs.H,, :u 95 605.9 OD.H0:u=600vs.Ha:u