4- In an electrostatic precipitator (ESP) system, dielectric constant is 6 and local field strength is 350 kV/m. Collecting area to flowrate ratio is found to be 10 s/m. Calculate the individual and overall efficiency of the ESP (in %) for the particle data given in Table 2 below by using the mixed-flow equation (0 = 8.85x10-12 C/v.m and : 1.8x10-5 kg/m s). Table 2. PM data for ESP. Particle Size (um) Mass % in Size Range 1.0 15 2.5 20 5.0 30 7.5 20 10.0 15