SECTION 2.1 Exercise Set 2 2.4 Classify each of the following variables as either categorical or numerical. For those that are numerical. determine whether they are discrete or continuous. a. Brand of computer purchased by a customer b. State of birth for someone born in the United States c. Price of a textbook d. Concentration of a contaminant (micrograms per cubic centimeter) in a water sample e. Zip code (Think carefully about this one.) f. Actual weight of coffee in a can labeled as containing 1 pound of coffee