4The magnitude of the net force exerted in the x direction on a 3.85-kg particle varies in time as shown in the figure below. F (N) 4 3 2 1 1 t (s) 2 3 4 5 (a) Find the impulse of the force over the 5.00-s time interval. = 12i N.S (b) Find the final velocity the particle attains if it is originally at rest. m/s f (c) Find its final velocity if its original velocity is -3.50 m/s. m/s (d) Find the average force exerted on the particle for the time interval between 0 and 5.00 s. F N avg