Calculate √ (5(x² - y) + 7(y² + x)j) · dr if: (a) C is the circle (x − 1)² + (y − 1)² = 9 oriented counterclockwise. - . Sc (5(x² − y) i + 7 (y² + x)j) ·dr = (b) C is the circle (x − a)² + (y - b)² = R² in the xy-plane oriented counterclockwise. - Sc ( 5(x² − y) i + 7 (y² + x ) j) · dr = .

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