Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to install plastic lawn edging [title] Use a sod-cutting spade or tree-planter's dibble to cut the lawn in the desired shape of your flower bed. [step] It is most effective to make the cuts straight downwards (vertical), as this will provide the proper angle for the lawn edging. Push your spade down below the level of the grass roots (at least 10 inches).

Ending1: It also promotes the edging to create an angle greater than the ground level because grass does not grow as deep. Use a downward sawing motion to make individual cuts across the grass. Ending2: You may use the front foot to lower the stakes, but do this only if they are angled downwards rather than up. [title] Mark the results on the sod surrounding the growing phase of your flower bed. Ending3: Smooth the edging to make it neater. [title] Make adjustments in the size of your flower bed. Ending4: Now, lever the handle of your spade downward to lift up the sod you wish to remove. This completely loosens all of the grass roots.

Answer format: ending1/ending2/ending3/ending4