Assistance gaining the critical value, margin of error, and confidence interval. Can you also explain it to me in better way than a textbook? I think this is where I am lost the most.

Here are summary statistics for the weights of Pepsi in randomly selected cans: n :36, i: 0.8.2408 ID, 5 = 0.00516 lb. Use a confidence level of 99% to complete parts {a} through {(1) below. a. Identify Ihe critical value tn\