The inverse market demand is given by (P = 150 - 2Q) If the incumbent continues to produce 10 units of output, which of the following equations best summarizes the potential entrant's residual demand curve?
I) P = 130 - 2Q
II) P = 150 - 4Q
III) P = 130 - Q
IV) P = 140 - 2Q
V) P = 75 - 0.5Q