Thermodynamics??

A 50g thermometer is used to measure the temperature of 180 mL of water. The specific heat of the thermometer, which is mostly gl, is 750 J/kg K, and it reads 18.0 degrees C while lying on the table. After being completely immersed in the water, the thermometer's reading stabilizes at 75.1 degrees C. What was the actual water temperature before it was measured?