Where, as a general rule, is the core of the polar front jet stream to be found?

Question

Question ATPL - Airline Transport Pilot license - Meteorology

QuizVDS · Accepted Answer

In the tropical air mass.

QuizVDS · Answer

Just below the cold-air tropopause.

QuizVDS · Answer

Just above the warm-air tropopause.

QuizVDS · Answer

In the polar air mass.

Id 571 - ATPL - Where, as a general rule, is the core of the polar front jet stream to be found?