1. Which outcome should NOT ever happen in the context of an incumbent and a potential entrant:

a.a high-cost incumbent pretending to be a low-cost producer

b.a high-cost incumbent acting as if they are a high-cost producer

c.a low-cost incumbent acting as if they are a low-cost producer

d.a low-cost incumbent pretending to be a high-cost producer

2. Capacity expansion is credible to deter entry:

a.not when plant capacity is a sunk cost and not when plant capacity is able to be re-sold at a market value

b.when used plant capacity is a sunk cost

c.when used plant capacity is able to be re-sold at a market value

d.both when plant capacity is a sunk cost and when it can be re-sold at a market value

3. A second-mover advantage exists in a duopoly context:

a.never

b.for a Stackelberg model

c.for sequential price competition with differentiated products

d.for a Cournot model

plz answer correct explain