please i need answer for these multiple choice questions

You are given the following Demand & Supply equations Q d = 10-0.5 p s Q s = -2+ps Answer the equations 29 through 32 : The consumer surplus is equal to-31 :Select one a. $36 O b. $32 O C. $38 O d. $34 OA natural monopoly exhibits which of the ?foi|owing characteristics :Select one a. decreasing average cost over a large 0 range of output b. decreasing marginal cost over a large O range of output c. constant average and marginal costs 0 d. increasing average cost over a large 0 range of output e. both a and b O You are given the following Demand & Supply equations Q d = 10-05 p s Q s = -2 + p 3 Answer the equations 29 through 32 : The consumer surplus is equal to-31 :Select one a. $36 0 b. $32 0 0. $38 0 d. $34 0