Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to build a tray ceiling [title] Attach drywall to the entire ceiling. [substeps] Cut drywall to size with a sharp utility knife and a straightedge. Smoothen the edges of the drywall with coarse sandpaper and a sanding block.

Ending1: Utilize homemade 2-by-4 t-braces to assist yourself and a partner when installing the drywall. Rent a cradle lift for assistance if you are installing the drywall panels yourself. Ending2: Once the drywall is evenly patched, drill holes in its corners with drywall-heavy nails. Pat a thin border of drywall around the windows and ceiling holes with a painter's tack. Ending3: Drywall laying in a very thin board will sometimes tear when sanding. Have the drywall matted to the ceiling with a grout, and then install a drop back ceiling (tpx-sturdy). Ending4: [title] Connect drywall to the new tray wall with a drywall primer. [substeps] Cover all edges of the new tray wall with drywall compound, paint, and wallpaper, and apply a layer of higher than where you have previously applied the existing wallpaper.

Answer format: ending1/ending2/ending3/ending4