Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to make coffee using a percolating coffee pot over a campfire [title] Arrange your firewood. [step] Gather the wood you'll be using for the fire and stack or bundle it together. The simplest way to build a campfire is to use the " teepee " method, standing multiple smaller sticks upright and leaning them together so that they meet at the top.

Ending1: [substeps] Since you'll be using firewood that's already dry, the firewood should be soft and moist. Leaves and twigs are usually not enough for a campfire. Ending2: This method can be used as a sort of starter fire, provided this fire is kept hot and moderately cool. [substeps] Make a small " teepee " pile by stacking firewood against each other and piling several smaller sticks together. Ending3: Scatter your tinder (fire-starting materials that are easily ignited, such as dry grass, bark or cotton balls) in the center of the teepee around the base. Leave a small space in the center for oxygen to flow through. Ending4: Make a fireplace in the middle of the newly constructed campfire. [substeps] Tie the sticks apart so that twigs fall in matching clusters.

Answer format: ending1/ending2/ending3/ending4