Sketch a plot of the vector field F = yi for (x, y) in the rectangle 1 ≤ x ≤ 2, 0 ≤ y ≤ 2. From the plot, use the marginal box that describes the interpretation of div and curl to determine whether div is positive, negative, or zero at the point (1, 1), and whether a paddle wheel placed at (1, 1) would rotate clockwise, counterclockwise, or not at all.