A car drives north, then east, then southwest. Find the displacement and average velocity

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A car drives north at 36mi/h for 10 min and then turns east and goes 5.0 mi at 66mi/h . Finally, it goes southwest at 32mi/h for 6.0 min.

Find the car's displacement and find the average velocity for the trip. Both is in x & y components.

I'm having a really hard time all around with this question. i drew a triangle, but not sure which components are x and which are y

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The assignment question should be considered incomplete without specifying which cardinal direction corresponds to $x$ and which to $y$, but the most common convention I've seen is that $\bf\hat{x}$ points east and $\bf\hat{y}$ points north.