The gure shows the y-position (in blue) of a particle versus time. ,v (m) 20 16 12 012345\") (a) What is the average velocity of the particle during the time interval t = 1.50 s to t = 4.00 5? (Express your answer in vector form.) 2.8j m/s X (b) Using the tangent to the curve (shown as the orange line in the figure), what is the instantaneous velocity of the particle at t = 1.50 5? (Express your answer in vector form.) 6f m/s X (c) At what time is the velocity of the particle equal to zero? 3.75 5