Are the following variables Qualitative or Quantitative?  a….

Are the fоllоwing vаriаbles Quаlitative оr Quantitative?  a. The number of thermometers outside a research institute. [answer1] b.  Eye colors of students in the class. [answer2] c. The ages of presidents the year they were elected.  [answer3] d. .  T-Shirt sizes of S, M, L. [answer4]