A bicycle is coasting down the road in a straight line parallel to the x-axis. The image below represents the bicycle's velocity function. Determine the average speed and average velocity of the bicycle for the first 4.5 s. 

• A. s_ag = 5.5 m/s
  v_ag = 2.44 m/s
• B. s_ag = 5.5 m/s
  v_ag = 5.5 m/s
• C. s_ag = 5.7 m/s
  v_ag = 1.75m/s
• D. s_ag = 5.7 m/s
  v_ag = 5.7 m/s

Answer: (D)