Hello, I have a question regarding an assignment. It is not clear to me what is being asked of me in questions b (what intervals?) and c ( how do I interpret it?). I have tried to answer question a to the best of my abilities. I have included a screenshot for context. Thanks!

We have a sample of students that followed a History course. Consider these students as a representative sample of all students that attended this course. Given are the marks on the exam on scale from 0 till 100. 56 74 92 67 49 82 93 74 41 32 67 64 Give a 90% confidence interval for the mean score for the History exam. Do this via the following steps: a. Give the calculation of the margin of error: p = .12 z* = 1.645 0, 12(1-0,12)/12 = 0,0088 = 0,0938 * 1,645 = 0,1543 b. Report the interval: c. Give a clear interpretation of the interval