A mineral processing plant aims to separate a mixture of iron ore particles based on their settling velocities. The mixture consists of two particle sizes: small particles with a diameter of 100 micrometers and large particles with a diameter of 500 micrometers. The small particles have a density of 4,000 kg/m, while the large particles have a density of 5,000 kg/m. The plant operator wants to determine the settling velocity required to achieve efficient separation of these particles. The density of the fluid is 1,200 kg/m, and the fluid viscosity is 1.5 10^-3 Pas. Calculate the settling velocities of both particle sizes and comment on the feasibility of achieving separation