The force shown in the force vs. time diagram in the figure below acts on a 1.8-kg object. F. (N) 2 (S 2 3 4 5 (a) Find the impulse of the force. N . S (b) Find the final velocity of the object if it is initially at rest. m/s (c) Find the final velocity of the object if it is initially moving along the x-axis with a velocity of - 1.5 m/s. m/s