Statistics question. Please help in answering all parts. Thank you

An organizational psychologist wants to know if attending a training session changes the productivity of workers. The organizational psychologist knows that the mean productivity of workers in the population of workers is 66 with a standard deviation of 8. The productivity of the population is normally distributed. The organizational psychologist took a sample of 25 workers and gave them all the training session. After training, the mean productivity was M = 70. She then compared the mean productivity of the sample workers to the mean for the population. Use a = .05. For each question, show you work. Compute the appropriate 2 score. (3pts) What is the p-value associated with the above z score? What is the critical value being used for this comparison? (2pts) p-value: critical value: Compute the effect size. Is this a small, medium, or large effect? (1.5pts) effect size: small, medium, or large effect: Did the training have a statistically signicant effect? How do you know? (2pts)