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a) Find the displacement of the particle from its original position, when t=5s

I got the ans for this by integration and limits 5 and 0 =- 43.8

b) work out the distance that the particle travels from t= 0 to t=5

I don't understand this. Velocity is positive from 0 to 3 and negative from 3 to 5 when I plot the velocity time graph.

I tried integration again with limits 3 to 0 and the next limit from 5 to 3. Iam not getting the ans which is 84.3m