1. (4 Marks) Specify whether the following variable(s) is categorical (qualitative) or numerical (quantitative). Also, specify the level of measurement (Nominal, Ordinal, Interval or Ratio). No need for full sentences here, just specify What type of variable and level of measurement it is. a) School ID Number of a Student (2 Marks) b) Income tax brackets of Professors in dollars (e.g. Below 60000, 60000-90000, 90000- 120000, etc) (2 Marks)