Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to write a letter to your future self [title] Choose an age. [step] Before doing anything else, decide how old you want your future self to be when you read this letter. You may want to read the letter when you're 18 , 25, or 30 years old.

Ending1: Choosing an age will help you define the goals you want to achieve by that time in your life. [substeps] You may want to choose an age that puts you in different circumstances than you are currently in. Ending2: If that's the case, pick a child, what age, if any, you want your future self to be. However, if you're writing to a child, try to avoid anything beyond 20-30 or 30. Ending3: Go back and read it several times to figure out how old it is. [substeps] It can help to ask yourself what you would want to be in the future. Ending4: These are the ideal ages for most people to read the letter. [substeps] Don't make your opportunity to read the letter a trap.

Answer format: ending1/ending2/ending3/ending4