Heat Transfer│Please Help!

Question

A piece of hot metal (400 K) is place inside a beaker of cold water (285 K). Which of the following gives the only possible final temperatures of the metal and the water after the system reaches equilibrium?

1. Metal temperature is 300 K, water temperature is 310 K
2. Metal temperature is 305 K, water temperature is 305 K
3. Metal temperature is 350 K, water temperature is 325 K 
4. Metal temperature is 285 K, water temperature is 400 K

Answer 1

Heat transfer occurs until the metal temperature and water temperature are the same.

So the only possible final temperatures of the metal and the water after the system reaches equilibrium are

1. Metal temperature is 305 K, water temperature is 305 K

The other 3 choices are ruled out because the metal and water temperatures are not the same.