A stаtistics prоfessоr hаs just given а final examinatiоn in his statistical inference course. He is particularly interested in learning how all students who took the course this semester performed. He has the following grades from his class of 40 student’s performance on the exam. The scores are shown below. You may copy and paste the table directly into Excel for calculations. 77 81 74 77 79 73 80 85 86 73 83 84 81 73 75 91 76 77 95 76 90 85 92 84 81 64 75 90 78 78 82 78 86 86 82 70 76 78 72 93 What is the first quartile on this exam? Round your answer to two decimals.