Would you please help all 4 parts of this question, thanks

Part 1 of 4 Points: 1 of 4 Save K When 80 convicted embezzlers were randomly selected, the mean length of prison terms was found to be 22.9 months and the standard deviation was 8,7 months A woman is running for political office on a platform of tougher treatment of convicted criminals. Test her claim that prison terms for convicted embezzlers have a mean of less than 24 months. Use a 0.05 significance level. State the null and alternative hypotheses. O A. Ho = 24 months O B. Ho H # 24 months Ha : H 24 months Ha H # 24 months