A stack in an urban area is emitting $360$ Kg per hour of So$2.$ It has an effective stack height of $80$m$.$ The wind speed is $8$ m$/$s at the top of the stack. It is a clear summer day$$with$$the$$atmosphere is slightly$$unstable$.1.$ Estimate the maximum ground$-$ level concentration of So$2$ and the distance from the stack at which the maximum concentration occurs $($Take $\backslash$sigma z$/\backslash$sigma y is constant with x$).2.$ Estimate the ground$-$ level concentration of So$2$ at a distance of $2$ km downwind at the center line of the plume $($x$=2000$ meter, y$=0$meter$$&$$Z$=0)$