1, preferably laid along the entrance direction of the gate.
It's best to lie down along the direction of the light coming in the living room.
3. It is best to spread it along the length of the living room.
If there are contradictions above, it is better to give priority to the living room.
Also, determine a main direction and suggest not to change it, even the direction of the bedroom, otherwise there will be too many thresholds at home and it will be uncomfortable.