De or het radiocollega?

The correct Dutch article is:

de radiocollega

How to use radiocollega

the radiocollegade radiocollega
this radiocollegadeze radiocollega
that radiocollegadie radiocollega
our radiocollegaonze radiocollega
your radiocollegajouw radiocollega
every radiocollegaelke radiocollega
which radiocollega?welke radiocollega?
a big radiocollega / the big radiocollegaeen grote radiocollega, de grote radiocollega