Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make blueberry lemonade [title] In a medium saucepan, combine the water and sugar on medium heat. [step] Mix with a wooden spoon until the sugar dissolves. [title] Add the blueberries and bring the mixture to a boil.

Ending1: [title] Bring down the heat to a simmer and heat until the blueberries break down. [step] Allow it to simmer for about 3-4 minutes. Ending2: [step] Pour in the buttermilk until the blueberries are soft. [title] Simmer on low heat until the buttermilk has evaporated. Ending3: [step] Bring the mixture to a boil and keep stirring the mixture constantly until the blueberries have dissolved completely. [title] Remove the mixture from the heat and pour the lemonade water and ice water mixture into a resealable plastic container with a tight lid. Ending4: [step] Meanwhile, add the juice of one lemon and cook until the sugar dissolves. [title] Do not season this honey mixture; it's not ready yet.

Answer format: ending1/ending2/ending3/ending4