Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to introduce yourself before giving a seminar [title] Pick the correct length of time. [step] Time allocation should conjure up images of goldilocks. It has to be.

Ending1: The start of a presentation might be 20 minutes, the end is 20 minutes. You can also shorten as much time as 12 minutes as you want. Ending2: Write a brief note reminding yourself of this. Write down the time of day in a timed notebook somewhere along the length of time you intend to give the seminar. Ending3: Too long and you waste the audience's time. Too short and the audience is disoriented. Ending4: If you're planning a seminar in a more formal setting, then the time isn't as important. [title] Start booking, not handing out the prerequisite details.

Answer format: ending1/ending2/ending3/ending4