The Final Artwork is a 3 color file for screen printing. Bharat Bhai from NID Print Labs helped me a lot to separate the files. In screen printing since colors are printed singly, one on top of the other, so 3 files need to be given to the printers to develop positives.
Positives for screen printing are transparent films on which the artwork is printed (each color separated) so that it can be exposed for the screen later for screen printing.
Following are the visuals of how I color separated my artwork.
Positive 1: Dark Brown
Positive 2: Yellow
Positive 3: Orange
The Final Artwork: