A 0.875 kg toy truck is initially at rest on a horizontal frictionless surface. The initial position is the origin (x = 0). A child applies a force in the positive direction parallel to the x-axis and equal to 1.50 N at t = 0 on the toy. The force is withdrawn at t = 1.80 s. The force is once again applied at t = 4.20 s and continues to be applied until t = 7 s. Determine the speed and position of the toy at t = 6.50 s.