A physics instructor directs three students to pull a ring, as shown in the image. The students have different abilities, hence exerting different pulls. One student applies 4.0 N on the first cable, and a second student exerts 6.0 N on the second cable. Determine the pull a third student must apply on the third cable to keep the ring stationary. Express the direction as an angle measured from the negative x-axis.

• A. (4.0i - 3.46j) N, 40.9° below the negative x-axis.
• B. (4.0i - 3.46j) N, 40.9° below the positive x-axis.
• C. (2.54i - 2j) N, 38.2° below the positive x-axis.
• D. (2.54i - 2j) N, 38.2° below the negative x-axis.

Answer: (B)