Extracted text: 10 kN 30° 60° 8 kN 5 kN 18 kN Four forces are applied to a particle, as shown above. Which of the following is closest to the angle 0 such that the resultant force is oriented vertically (i.e. parallel to the y-axis)? a) 41.6° O b) 34.5° c) 10.1° d) 87.9°