Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to answer a question on stack overflow [title] Visit the stack overflow website. [title] Click on questions. [substeps] You can then sort by newest, featured, frequently asked, questions that need voting, questions that are active, and questions that don't yet have an answer.

Ending1: [title] Click on a list of featured books. [substeps] Click on the category that interests you. Ending2: These hundreds of questions are arranged alphabetically from most to least important. This will allow you to catch the tedious questions with ease. Ending3: If you don't find a question that you want to answer, consider searching by tag instead. By searching for a particular tag, you can find questions that are best suited to what you know a lot about. Ending4: [title] Click on a category you want to vote on. [title] Click on " vote " next to " active vote.

Answer format: ending1/ending2/ending3/ending4