Q$2$ :A suspension contains spherical particles with a diameter of $0\mathrm{.}1mm.$ The particles have a density of $2650k\frac{g}{m^3},$ and the suspending fluid has a density of $1000k\frac{g}{m^3}$ and a viscosity of $0\mathrm{.}001Pa*s.$ The volume fraction of fine suspension is $90\%.$

a$.$ What is the hindered settling velocity of the particles in the suspension?

b$.$ What is the percentage difference in settling velocity between hindered settling and free settling?