The demand for cigarettes is given by P​ = 450-0.2Q. Cigarettes are manufactured at a constant marginal cost of 50 and sold in a competitive market. What is the quantity of cigarettes sold in​ equilibrium? QPrivate= 2000.00 If cigarettes generate a marginal external cost of MEC​ =0.20​Q, what is the socially optimal level of​ cigarettes? QSocially optimal​= 1000.00 My Question is I want to know how we can get the answer which are 2000 and 1000? What is the calculation for the answer of the question above?

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