B. I can not get these answers to come out right . where is my mistake?

Demand for apartments in a cortain town is D(x)-2100-x, and the supply is S(x)=600 +11x, where x is the number of apartments, in hundreds, and D(x) and S(x) are the rent in dolars per month, per apartment. a) Find the equilibrium point. b) Find the consumer surplus and producer surplus. c) Suppose a maximum rent of $1590 per month is imposed by the town council. Find the point (xc. PC) d) Find the new consumer surplus and new producer surplus. e) Find the deadweight loss. a) Which of the following would be the best first step to find the equilibrium point? O A. Find the value of q such that D(x) dax= [S(x) dax O H. Solve D'(x) = S'(x] for x. O C. Solve Dix) - Six) for x O D. Solve D(x) = 5'(x) for x 4 Find the equilibrium point