Categorize these measurements associated with student life according to level: nominal, ordinal, interval, or ratio.(a)Length of time to complete an examnominalordinal intervalratio(b)Time of first classnominalordinal intervalratio(c)Major field of studynominalordinal intervalratio(d)Course evaluation scale: poor, acceptable, goodnominalordinal intervalratio(e)Score on last exam (based on 100 possible points)nominalordinal intervalratio(f)Age of studentnominalordinal intervalratio