suppose that the market demand curve is given by Q=10-P and that production costs are zero for each four oligopolists. (a) determine the level of output of each four oligopolists according to the cournot model.(b) suppose then the demand function increases and shifts to Q*= 15-30P. Will the price change or stay the same? Why? (c) Draw a figure showing the best level of output, price, and profits per unit and in total.