Please help!

4. You are conducting a study of the effects of concussions on cognition. Intelligence quotient (1.Q.) is a cognition test. The national average is set at 100. You give an IQ test to several student athletes who have suffered concussions this season. IQ scores: 82, 94, 76, 109, 83, 82, 107, 102, 99, 96 A. (10 pts.) Calculate a 90% confidence interval using this data. [NOTE: Use your calculator's statistics function. You do not have time to complete all of the calculations by longhand.] B. (5pts) Graph the result on the included grid. C. (3 pts.) Does your graph show evidence that concussions impair cognition? Explain