1. Parts (a)-(c) refer to the vector field F shown to the right, together with the 5 curves C1, C2,., C5. Let Có be the closed curve given by C1+C2+ C3 + C4. (a) Is ſc. F ·dr positive, negative, or zero? Explain, using a complete sentence. (b) Is ſc. F ·dr positive, negative, or zero? Explain, using a complete sentence. (c) Rank the following quantities in order from smallest to largest: F - dř, F - dř, F-dř, F - dř,F F - dř

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