Answer
$\frac{∂_w}{∂_r}= \frac{∂_w}{∂_x}\times\frac{∂_x}{∂_r}\\
\frac{∂_w}{∂_s}= \frac{∂_w}{∂_y}\times\frac{∂_y}{∂_s}
$
Work Step by Step
Solution diagram:
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