Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to form an eco group at school [title] Make a preliminary plan. [step] You need to have the basic things covered before you go any further with your idea. You can expand your ideas later on.

Ending1: That said, you don't want to be tight-lipped all the time. [title] Download a copy of the key pieces of your idea and follow them in order. Ending2: [substeps] The key things to consider are who, what, where, why and when. [title] Approach your head teacher about the idea. Ending3: [title] Before you begin, you should meet with a few of your classmates to discuss the ideas you've come up with. [step] They will help you decide how much to talk about, and will encourage each other to see if you really need to keep it to a minimum. Ending4: [substeps] Start by thinking about what sort of groups you would like to make. There may be smaller groups in your school you could join, or individual groups you think you might like to fall in.

Answer format: ending1/ending2/ending3/ending4