Read all the scenarios from a- g below. Then, write the null and alternative hypotheses. Indicate where the claim is located and identify the direction of the test.

a. The firm claims that the mean annual return for an employee's IRA is at most 4.2 percent.

b. According to New York state bar association, the mean age of lawyers in New York is 53.4 years.

c. Subaru claims that during third year of any new models mean repair bill of cars is less than $150.

d. Duke Energy encourage its customers to use energy efficient bulbs, they claim that for the household used these bulbs, the quarterly mean utility bill was less than $107.

e. Investopedia reports that the mean annual return for an employee's IRA is at most 5.4 percent.

f. Technavio magazine claims that according to their customer survey, the majority of people are not yet comfortable with drone delivery.

g. The owner of an outdoor store recommends against buying the new model of one brand of GPS receivers because they vary more than the old model, which had a standard deviation of 50 meters.