vector resolution

[captain_kirk]

okay, i know it's probably pretty simple
but my textbook has no worked examples and i can't find any notes on this area
if a = 2i + j - 2k and b = 4i - 3j, resolve a into two components, one parallel to b and the other perpendicular to b

i'm not sure as to what formula are applicable in these questions so any help will be greatly appreciated

[tony3272]

Parallel to b is (a.b^{^})b^{^}
Perpendicular to b is a-(a.b^{^})b^{^}