Please choose the correct ending to complete the given sentence: Health: [header] How to make acidophilus [title] Prepare a solution of agar. [step] Follow the directions given on the bottle. [title] Pour the solution into a petri dish.

Ending1: [step] If the petri dish contains agar, it needs to be boiled so that it is cold before stirring. [title] Place a water bowl on the upper middle of the petri dish. Ending2: [step] Pour in enough agar solution to cover the bottom of the dish. [title] Rotate the dish until the agar covers the bottom to an even depth. Ending3: [step] Make sure you get a good amount so that at room temperature it sublimates. [title] Wait until agar is dissolved by washing the petri dish by itself in warm water. Ending4: [step] Sprinkle the salt over the water and top it with 2-3 tablespoons of agar extract , 1 1/2 tbsp. Provolone, anise , 1 tbsp.

Answer format: ending1/ending2/ending3/ending4