Answer: The maximum resultant force: 12 N
The minimum resultant force: 2 N
Explanation: A force is actually a vector. And if there is no angle among these two forces (or let's say "vectors"), this is the maximum situation (not a general rule, but it is valid for this question because both vectors are positive) and we add these forces up for the solution. So, the magnitude of this resultant force would be 12 N.
Drawing one force vector which has 12 N magnitude and acts on the object would be enough for the solution.
However, the angle among them should be 180 degrees so that the minimum situation exists. So, we are actually subtracting these two forces instead of adding them here.
This means that drawing one force vector which has 2 N magnitude would be enough for the other solution.