1. The graph below shows the velocity of an object moving in a straight line over a 20 second journey.
\includegraphics[max width=\textwidth, alt={}, center]{82e828ab-0812-4de1-b066-720f3632046f-04_581_1678_395_191}

1. Find the maximum magnitude of the acceleration of the object.
2. The object is at its starting position at times \(0 , t _ { 1 }\) and \(t _ { 2 }\) seconds. Find \(t _ { 1 }\) and \(t _ { 2 }\)
   [0pt] [4 marks]