1. The following data show the method of payment by 56 customers in a supermarket checkout line. Here, C refers to cash, CK to check, CC to credit card, D to debit card, and O stands for other. C CK CK C CC D O C CK CC D CC C CK O CK C CC D D C CC CC CC O C D CK C D CC D CC CC D CK CK CC CC CC CC D C C D CK O D D C CC CC C CC CC CK (a) Construct a frequency distribution for the data. Show the tallies, frequencies and percentages of all classes/values [20 points]