please I want a computer line solution

3.6kg of solid particles of density 2590kg/m3 and surface-volume mean size 748 micrometer form a packed bed of height 0.475m in a circular vessel of diameter 0.0757m. Water of density 1000kg/m3 and viscosity 0.001Pa s is passed upwards through the bed. (a) the bed pressure drop at incipient fluidization, (b) the superficial liquid velocity at incipient fluidization, (c) the mean bed voidage at a superficial liquid velocity of 1.0cm/s, (d) the bed height at this velocity and (e) the pressure drop across the bed at this velocity