Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to check water temperature without a thermometer [title] Hold your hand near the water. [step] If you want to form a very rough idea of whether water is cold, lukewarm, or hot, first hold your hand above the water. If you feel heat radiate off of the water, it is hot and may burn you.

Ending1: [title] Distinguish between cold cold and hot water. [step] In general, lukewarm water is generally cooler than hot water. Ending2: If you feel cold, this is the heat you have been waiting for. If your hand is a bit colder, you should hold it below the water in this situation. Ending3: [title] Set your thermometer to the highest temperature in the room you need to check water temperature. [step] The thermometer needs to be between 250 and 240 degrees fahrenheit (74 to 76 degrees celsius). Ending4: If you feel no heat, the water will either be room-temperature or cold. [substeps] Do not stick your hand directly into water-either in a kitchen or in nature-without first holding your hand above it to gauge the temperature.

Answer format: ending1/ending2/ending3/ending4