Create Image for Product

I have the attached photos of a product (a backpack type battery) showing:
a) Person, having the battery on his back (head not showing)
b) Photo of the Battery
c) Photo of Harness that allows the worker to carry the battery on his back)

I would like:
a) An image of a "model worker" carrying the battery .
Should not be the actual worker, but a model
Show the model worker from 3 different perspective

b) Combine and touch up photos of battery box and harness
(And do some touch-up)

I am only allowed to upload 3 photos.

However, I can provide more photos, if that helps