Answer:- Tegan should cook and Sara should clean up the kitchen.
Explanation:There is a very high chance that a person will be motivated to do what they are good at and they will do it well.
There is a balance between these two one is good at something that the other one is not good at which create an equilibrium situation for them.
Tegan will cook because he is good at cooking which will mean they will have great meals and enjoy them whilst Sara will clean up the room and it will be spotlessly clean.