You can use any of them you want, or all of them.
I can even draw you up a freash one of some other grab or invert or position you want and keep the extra grays out.
I would take me about a day to do it all. I usually throw out the 1st couple because they didnt turn out the way I wanted, then I have to ink them in heavy and make sure there are no openings, then scan it in and save it somewhere.
Truthfully it would take me about an hour tops but Im not sure exactly when I could get to it in between work and Im not sure when your kids report is due.