The prices of some car washes in United States is listed below. 50 56 62 77 53 59 65 82 55 61 68 a) Construct a group frequency distribution using 4 classes. (3 points) Class Limits Class Boundaries Frequency Relative Frequency (Round to two decimal places) - - - - - - - - b) Construct a cumulative frequency distribution with the price of some car washes in the United States. (3 points) Class Boundaries Cumulative Frequency Cumulative Relative Frequency (Round to two decimal places) less than less than less than less than less than