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When working out multiple vectors, I understand that it is necessary to break them down into components. (I've been taught to graph the x component and y component for each vector and then add all the x components, ad all the y components then R=square root of (x^2+y^2))

However I keep coming up with the wrong answer for this problem:

A cyclist undergoes three successive displacements of 120m at N40E followed by 82m at S72E and finally 195m at S35W. (all in degrees)

The answer is 102.7m at S24.9E

but I get 120.4m at S69.3W??? What have I done wrong?.