Watch help video A particle moves along the x-axis so that its position at time 0

Watch Kelp video A particle moves along the x-axis so that its position at time 0 < t < 18 is given by c(t), whose graph is shown in the figure below. Find the total distance traveled by the particle on the interval O < t < 18. 1 2 3 4 5 6 7 8 9 10 1 12 14 15 16 7 18 19