Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to install a kitchen sink drain [title] Prepare your work space. [title] Apply a thin beading of plumbers putty around the circumference of the hole in the sink bowl. [title] Disassemble the drain insert.

Ending1: [title] Line up 2 hooks which will be inserted into either side of the sink. [title] Place 2x4 pieces of old plywood over the hole in the faucet pipe-if using a " 2x4, " measure the distance and/or width of each hook. Ending2: [title] In the center of the hole, remove the drain drain base's screws. [title] Put the drain in with the drain insert. Ending3: [title] Insert the top half of drain insert into the hole in the sink bowl. [title] Firmly press down, compressing the plumbers putty. Ending4: [title] Follow the instructions for installing the plumbers putty. [title] Pour 112ºf mud along the top half of the sink bowl.

Answer format: ending1/ending2/ending3/ending4