Suppose the magnetic field in some region of space has the form = (k z, 0, 0), where k is a constant. Find the force (magnitude and direction) on a square loop (side a), lying in the yz plane and...

Extracted text: Suppose the magnetic field in some region of space has the form = (k z, 0, 0), where k is a constant. Find the force (magnitude and direction) on a square loop (side a), lying in the yz plane and centered at the origin, if it carries a current I, flowing counterclockwise, when you look down the x-axis.