Identify the following variables as qualitative (Nominal /Ordinal Data) or quantitative (Discrete / Continuous Variables).

(a) the ethnic origin of a job candidate.

(b) the score from 0 to 100 in a final examination.

(c) the fast-food establishment preferred by customers such as McDonalds or Burger King.

(d) the mercury concentration in a sample of tuna.

(e) the shelf life of a particular medicine in the pharmacy.