Some time later at kmet, the surface wind (horizontal) pattern is observed to follow this relationship, where a is positive. u= -ax v=-ay a) sketch the horizontal flow at the surface. b) calculate the divergence of the horizontal flow. is this flow convergent, divergent, or neither? c) assuming the surface near kmet is smooth and flat, derive a formula for vertical velocity w as a function of height 2. hint: use the continuity equation for an incompressible fluid of constant density.