Just find the pressure difference p2-p1. Since the tube is horizontal, y=0, so you just need to basically find 1/2rhov1^2-1/2rhov2^2.
After getting the pressure difference, just multiply it with the area to get the force!
(I think that's right, I didn't actually see the question, just my working, LOL.
Hope it helps! And good luck...34 minutes to go...
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EDIT: Oops, did you even ask help for that? O__O LOL.