A fluid of viscosity $0\mathrm{.}9N\frac{S}{m^2}$ and sp gravity $1\mathrm{.}25$ is flowing through two parallel plates $3mm$ apart. Determine the following:

i$.$ Maximum Velocity

ii$.$ Pressure drop per unit length

iii. Shear stress at the walls of plate if the average velocity is $0\mathrm{.}2\frac{m}{sec}.$

Assume temperature is $20C$