53. Correct. The answer is true. At P* = 8, Q* = 17-1/2*P = 17-1/2*8 = 13. Therefore,

CS = o13P(Q)dQ - Q*P* = o13 (34-2Q)dQ - 8*13 =[34Q-Q2] - 104 = (34*13 - 132) - 0 - 104 = 169.