Answer:
Net force acting on them is 16 N and it is acting to the right side.
Step-by-step explanation:
It is given that,
Force acting by the dog,
(right side)
Force acting by Simone ,
(backward)
Let backward direction is taken to be negative while right side is taken to be positive.
The net force will act in the direction where the magnitude of force is maximum. Net force is given by :

F = 16 N
So, the net force is 16 N and it is acting to the right side.