Can anyone solve this

#6a). Refer to the graph above. What is the total profit at the monopolist's profit-maximizing output? #6b). If the monopolist is regulated and forced to charge the socially optimum price, what will be its price and output ? Use the following to answer question below: Output STC 150 210 30 300 350 410 10 790 #6c). Refer to the information above to answer this question. What is the value of marginal cost at economic capacity