At a certain location along the ITCZ, the surface wind at 10?N is blowing from the east-northeast (ENE) from a compass angle of 60° at a speed of 8ms-1 and the wind at 7°N is blowing from the south-southeast (SSE) (150°) at a speed of 5 m s-1. (a) Assuming that ∂/∂y >> ∂/∂x, estimate the divergence and the vorticity averaged over the belt extending from 7°N to 10°N.