Final answer:
Without additional information on the mass of the bullets and the time over which the force is applied, it is not possible to accurately determine the average force and velocity of the gun. Additional details are required for a correct calculation.
Step-by-step explanation:
The question concerns the concept of impulse and the application of Newton's second law to find the average force and the velocity of a gun as it fires bullets. To calculate the average force exerted by the gun, we can use the formula F = Δ(mv)/Δt where F is force, m is mass, v is velocity, and t is the time interval.
Given that the number of bullets leaving the gun per second is 2, we cannot determine the force or velocity without additional information on the mass of the bullets and the time over which the force is applied. Therefore, none of the options provided can be confirmed as correct without this missing information.