1. The figure below represents the position of a particle as it travels along the x-axis. x(m) 4 2- -2 2 3 4 t(s) Using the scale given in the graph and your best approximation of certain points on the graph. calculate: a) The average speed of the particle between t = 2s and t = 4 s? b) The average velocity of the particle between t=2s and t = 4 s? c) Calculate the instantaneous velocity of the particle at t=2s. d) Calculate the instantaneous velocity of the particle at t-4s.