02. Two industrial plants, A and B, are located 15 miles per apart and emit TS ppm (parts per million} and 300 ppm of particular matter, respectively. Each part is surrounded by a restricted area of radius 1 mile in which no housing is allowed, and the concentration of pollutant arriving at an}r other point Q from each plant decreases with the reciprocal of the distance between that plant and Q. Where should a house be located on a road joining the two plants to minimize the total pollution arriving 'orn both plants