How do I solve this problem:

According to a lendinginstitution, students graduating from college have an average credit card debt of $4100. A random sample of 50 graduating seniors was selected, and their average credit card debt was found to be $4424. Assume the standard deviation for student credit card debt is $1200. Using a=0.05

a. Determine the null and alternative hypotheses.____

b. The z test statistic is____

c. The critical z score is____

d. Because the test statistic is_____ ______the null hypothesis

e. The P value is____