Answer:
Spiral galaxy - The Milky Way is the one.
Irregular Galaxy - contains mostly young stars
Elliptical galaxy - contains mostly older stars.
Step-by-step explanation:
Galaxies are of classified according to their shapes:
Elliptical galaxy - It is a smooth shaped, nearly featureless galaxy. It contains mostly old red stars.
Irregular galaxy - It does not have any particular shape. It contains mostly young blue stars.
Spiral galaxy - It has a bulge in the center and arms extend outwards and spiral it. Milky way galaxy, Andromeda galaxy are spiral galaxies.