Given the following frequency distribution table Noise Level (dB) Frequency 63 - 66 8 67 - 70 71 - 74 14 75 - 78 3 79 - 82 63 83 - 86 33 What is the class width? Number What are the class boundaries? Round to 1 decimal place. Enter as a list of values separated by commas, for example 1, 2, 3 What are the class midpoints? Round to 1 decimal place. Enter as a list of values separated by commas, for example 1, 2, 3