5. Ms. Mcnairn spikes a volleyball right into the face of Mr. Howie. The graph below shows t magnitude of the net force as a function of time for the 455 g volleyball. Assume the ball i motionless before it is struck. a. Using the graph, calculate the magnitude of the impulse on the volleyball. (2 marks) b. What is the speed of the ball when it leaves Mr. Mcnairn's hand? (2 marks) Magnitude of Net Force vs. Interaction Time for a Volleyball Spike 2000 1500 Magnitude of Net Force Fret (N) 1000 500 0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 Time t (ms)