Question $3$: $($CLO $2\mathrm{.}2)$

A square plate $0\mathrm{.}1$ m side moves parallel to a stationary plate with a velocity of $0\mathrm{.}1\frac{m}{s},$ both plates being immersed in water.

If the viscous force is $0\mathrm{.}002$ N and the coefficient of viscosity $0\mathrm{.}001$ poise, what is the:

a$)$ Distance between the plates

b$)$ The shear stress $()$ in $\frac{N}{m^2}.$