Four coplanar forces act on a point object:
1. 5N along 0∘ (positive x-axis)
2. 7N along 90∘ (positive y-axis)
3. 4N along 180∘ (negative x-axis)
4. 6N along 240∘
Calculate the magnitude of the resultant force on the object.
a) 3.4N
b) 1.8N
c) 2.7N
d) 4.5N