Question

for each of the six phases, which are endothermic and exothermic?

Answer 1

Exothermic is a reaction that releases heat. So the internal energy of the molecules is turned into thermal energy. Think "exert". Endothermic is the opposite, it takes in thermal energy and puts the energy into potential energy of the bonds between atoms. think "endure".

Answer 2

Ok where's the question?

Answer 3

But either way, Exothermic reactions would have a negative sign in terms of energy. This means that they lost energy or are releasing energy into the atmosphere.
Endothermic on the other hand have positive energy, which means that they gained energy from the surrounding atmosphere.
You might also want to think of bond formation and bond breaking. Bond breaking requires energy to break bonds, thus endothermic. Bond formation releases energy hence endothermic.