Can anyone help with the following questions?

Last fall, a sample of n = 20 freshmen was selected to participate in a new 4-hour training program designed to improve study skills.To evaluate the effectiveness of the new program, the sample was compared with the rest of the freshmen class. All freshmen must take the English Language Skills course, and the mean score on the final exam for the entire freshmen class was= 81.75.The students in the new program had a mean score of M = 83.54 with a standard deviation of s = 12.82.Test if the study skills training program produced a significant difference in scores using a two-tailed test with an= .01

1. What is the null hypothesis (H₀)?
2. What is the alternative hypothesis (H₁)?
3. What is the critical value for this study,= .01,two-tailed?
4. What does the standard error of the mean ( _Mor s_M) = ?
5. Calculate the effect size (Cohen's d)and identify ifthis effect size is small, medium, or large?
6. Identify the values associated with the 90% confidence interval.