If air flows across the wafer at 1 m/s, calculate the gravitational, van der Waals (assuming contact between 5,000 atoms), lift (force acts only on top half of particle), drag (assuming no boundary layer effects), and frictional forces (with s= 1) on the particle and comment on the relative magnitudes of these - in other words, is the particle going to fly off the surface, be blown along the surface, or not move