Just need number 3&4

For each demand function (d(x)) and demand level (x), find the Consumers' Surplus d(x) = 2600 - 7x d(x) = 100 - 0.2x 1 . 2. x = 150 x = 75 d(x) = 75e-0.03x d(x) = -0.5x2+ 225 3. 4. X 200 X = 16 For each Supply function (s(x)) and demand level (x), find the Producers' plus