Question: Three small circles, C1, C2, and C3, each with radius 0.1 and centered at the origin are in the xy-, yz-, and xz-planes, respectively. The circles are oriented counterclockwise when viewed from the positive z-, x-, and y-axes, respectively. A vector field, F→ , has circulation around C1 of 0.02π, around C2 of 0.5π, and around C3 of 3π. Estimate curl F→ at the origin.