Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to make a mega tic tac toe board [title] Unwrap shower curtain and lay on a flat surface. [step] It may be creased so consider doing this a few days before the party. If you don't have time to " de-crease " it days ahead of time, lay a sheet over the top and apply a warm iron to the sheet.

Ending1: [substeps] The heat from the iron will also set the keratin under running water. This is necessary to ensure that your board doesn't turn out too wet. Ending2: [title] Create the tic-tac-toe lines with the tape. [step] You will ultimately have nine boxes with the tape. Ending3: [substeps] This position allows the satin sheets to only look off due to the steam loosening the sheets. This is also an option in case you want a more dressy look for your party. Ending4: It should be about 110 ° f (43 ° c) for extra warmth. [title] Lay the white t-shirt face down on a flat surface.

Answer format: ending1/ending2/ending3/ending4