Find the class boundaries, the class interval, and the class marks of the frequency distribution constructed in Exercise 3.115.
In exercise

45.6 50.3 55.1 63.0 58.2 65.5 51.1 574 60.4 54.9 56.1 62.1 43.5 63.8 64.9 59.9 63.0 67.7 53.8 57.9 618 52.2 61.2 51.6 58.6 738 53.9 64.1 57.2 75.4 55.9 70.1 46.2 63.6 56.0 48.1 62.2 588 508 68.1 514 73.9 66.7 42.9 71.0 56.1 60.8 58.6 70.6 62.2 59.9 47.5 72.5 62.0 56.8 54.3 61.0 66.3 52.6 63.5 64.3 63.6 53.5 55.1 628 633 64.7 54.9 54.4 69.6 64.2 59.3 60.6 57.1 68.3 46.7 73.7 56.8 62.9 58.4 68.5 68.9 62.1 62.8 74.4 43.8 40.0 64.4 508 49.9 55.8 668 67.0 64.8 57.6 68.3 42.5 64.4 48.3 56.5