How many?

If I give you a cube of 1 unit and paint it red on all of its six sides.Then give you 26 more cubes which are painted like this only with red colour on all of itsides, to make a cube of 3 unit, now paint that cube green from all of its side. Now I give you 26 more cubes of 3 unit which are made from 27 cubes of 1 unit gone through the same process as said above, to make a cube of 9 unit now paint it blue, from all sides.

(a) painted green on three sides
(b) blue on 1 side
(c) red on all the sides

Give your answer as sum of a,b and c.