Oil with a dynamic viscosity of 0.08 ns/m2 fills the gap between two parallel flat horizontal plates. the lower plate is fixed and the upper plate is free to move horizontally. what force is required to push the upper plate at 0.1 m/s if the gap between the plates is 2.5 mm? the upper plate has an area of 0.125 m². assume that flow is laminar and velocity varies linearly with distance form the lower plate. a) 0.4 n b) 3.2 n c) 0.0032 n d) 0.0004 n e) none of the above