The supply curve for the product X is given by Q_X^S = -520 + 20P_X

_{a. find the inverse supply curve.}

_{P = ____________ + ______________ Q}

b. how much surplus do producers receive when Qx= 400? when Q_x = 1,200?

when Q_x = 400: $____________

when Q_x = 1,200: $ ______________