Which measurement level (nominal, ordinal, interval, ratio) is each of the following variables? (a) Number of employees in the Walmart store in Hutchinson, Kansas. (b) Number of merchandise returns on a randomly chosen Monday at a Walmart store. (c) Temperature (in Fahrenheit) in the ice-cream freezer at a Walmart store. (d) Name of the cashier at register 3 in a Walmart store. (e) Manager's rating of the cashier at register 3 in a Walmart store. (f) Social Security number of the cashier at register 3 in a Walmart store