Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to make invisible ink with baking soda [title] Mix baking soda and water. [step] Making a solution suitable for invisible ink will take almost equal parts baking soda and water. For the best results, you want to mix as much baking soda as you can into a small bowl of water.

Ending1: Mix enough water and the baking soda to form a thick paste, which you then apply to your mask. [substeps] If you don't have a specialty baking soda treatment, there are many other homemade treatments available, including a paste made from baking soda and water. Ending2: Mix this solution thoroughly with your hands or a scrubber or a brush until well combined. [substeps] Your baking soda solution should be thick enough for making invisible ink, but not thick enough to fill a cylinder like container with paint. Ending3: Add a little baking soda at a time and mix slowly to fully saturate the water. [substeps] 1/4 cup (60 ml) of water will hold 3 tablespoons (43.2 grams) of baking soda. Ending4: The baking soda and water mixture should create a thick film of tiny granules that seal together like bombs. [substeps] To wash out this " bomb " with bleach, dump the container into the sink and pour enough baking soda into it to completely submerge the object.

Answer format: ending1/ending2/ending3/ending4