please answer this question with clear handwriting

Question 4 (6 points) (a) The graph shows the velocity, v, at time t, for a moving body. Give an interpretation of the shaded area on the graph. (2) 1 1(b) If you jump from a great height without a parachute, you will fall faster and faster until wind resistance causes you to approach a steady velocity. This velocity is called the terminal velocity, Ut (i) Sketch a graph of your velocity (after jumping) against time, t, clearly showing Uf on your graph. (2) (ii) Explain the concavity of your graph. (2)