Add question slides at the end of T02a: LaTeX

@niazim3, please add a few sample questions to the end of the LaTeX tutorial (T02a). The questions can be in either multiple choice or short answer form. Besides helping review the tutorial content, the questions should also provide examples of questions that could appear on the midterm or the final.

You can create the questions in a separate branch. When they are done, please assign @horsmane and me as reviewers. We can discuss any potential changes and then merge into master.