do it with the steps plz i need to understand it

a 3. (Modified version of Problem 111) A lake with a constant volume of 10x10m is fed by a polution-free stream with a flow rate of 6.0 m/s. A factory dlecharpes 0.5 m/s of a non-conservative chemical at a concentration of 75 mg/l, Into the lake. The chemical degrades with a first-order rate coefficient of 0.25 Draw a diagram of the lake and write the appropriate mass balance equation, a b. Assuming that the lake is welwed, calculate the steady-state concentration of the chemical in the lake. Report your answer in units of pp. Calculate the mass of chemical of chemical that is entering the lake each day, the mass of chemical leaving the lake each day, and mass of chemical that is being lost by reaction each day. It the concentration of chemical in the factory waste jumps to 150 mg/l, what would be the new steady state concentration of the chemical in the skin unit of ppm C d