2.2 Evaluating teaching assistants. To assess how its teaching assistants are performing, the statistics department at a large university randomly selects three of its teaching assistants each week and sends a faculty member to visit their classes. The current list of 20 teaching assistants is given here. Use software, an online tool (for example, the Research Randomizer), or Table A at line 116 to choose three to be visited this week. Remember to begin by labeling the teaching assistants from 01 to 20.