17. [1.8/2.4 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYS1 2.8.065. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A graph of v(t) is shown for a world-class track sprinter in a 100-m race. (See figure below). Runner Velocity vs. Time 14 12 10 Velocity (m/s) 8 10 12 Time (s) (a) What is his average velocity for the first 4 s? 12 * m/s (b) What is his instantaneous velocity at t = 8 s? 12 m/s (c) What is his average acceleration between 0 and 4 s? 3 m/s2 (d) What is his time for the race? 10