kindly do both

(a) What is plume rise and the effect does it have on ground level pollution? (3 marks) (b) Estimate the plume rise for a 4-m diameter stack whose exit gas has a velocity of 30m s1 when the wind velocity is 2ms1, the pressure is 1atm, and the stack and surrounding temperature are 100C and 28C, respectively. The calculation based on Holland equation as given. (7 marks) Data: h=uVsD[1.5+0.00268PD(Ts)(TsTa)] 6. A dust collector device is designed to remove a particulate matter 2.5m(PM2.5). At an air flow rate of 180m3s1, the PM2.5 is emitted at a concentration of 125,000gm3. The device removes 0.48 metric ton per day. a) Develop a general material balance in a black box diagram. (5 marks) b) Determine the emission concentration. (7 marks) 2 KKKS6243 c) Determine the recovery percentage of PM2.5