State whether each of the following sets is well-defied or not.

_______1.the set of young politicians
_______2.the set type of matter.
_______3.the set of versatile actress.
_______4.the set of all oceans in the earth.
_______5.the set of months contraining 31 days.
_______6.the set of tasty food
_______7.the set of planets in our solar system.
_______8.the set of durable bags.
_______9.the set of condonants in the english alphabet
_______10.the set of even counting numbers.​