Suppose you had information from customers

Suppose you had information from customers
Suppose you had information from customers who shop at a grocery store, and you wanted to perform cluster analysis to identify groups of customers who have similar
shopping patterns. The data that you have includes the age, income, and educational level of the customer, and the yearly amounts each customer purchases of the
following food types: fruits, vegetables, milk, cereal, peanut butter, and bread. What are some of the data preparation steps that should be taken before performing
cluster analysis? What distance measure should be used?