Answer:
The neighbour
Double your work
Explanation:
Work is a product of force and distance, expressed as W=Fd where W is work in Nm, F is applied force and d is the distance in m
Since your neighbour pushes 4 times then you just push 1m when he pushes 4m, that is an example. Also, since the neighbour only exerts half the force ie 0.5N then you exert full force of 1N
Work from your neighbour will be 4d*0.5F=2dF
Work from you will be dF
Clearly, 2dF=2(dF) hence the neigjbour exerts double work
