Below are scores obtained by 100 students in a test. 50, 41, 72, 34, 38, 70, 69, 61, 44, 51, 74, 33, 70, 35, 68, 56, 70, 75, 60, 56, 63, 67, 80, 68, 59, 76, 50, 45, 50, 64, 67, 85, 86, 65, 82, 90, 95, 43, 52, 56, 76, 70, 76, 76, 65, 88, 52, 91, 50, 85, 62, 58, 67, 79, 46, 40, 51, 59, 73, 52, 42, 67, 38, 52, 43, 37, 69, 88, 30, 45, 66, 39, 46, 66, 69, 82, 34, 77, 58, 73, 50, 45, 60, 80, 72, 77, 62, 55, 89, 78, 55, 54, 56, 89, 80, 87, 61, 74, 54, 66, a. Using class interval size of 10, group the scores and compute coefficient of variation to show extent of spread.​