Please choose the correct ending to complete the given sentence: Youth: [header] How to make a plaster cast of an arm [title] Realize that you'll have to remove the cast. [step] If you are making your own plaster cast, you'll have to be able to remove the cast yourself. Removing a plaster cast requires having access to either plaster shears or an electric cutter.

Ending1: There are two types of plaster casts : 0.1 , 0.2, and 0.3. [substeps] 0.1 is the inner plaster cast while 0.1 is the outer plaster cast, used to create a covered plaster cast. Ending2: You'll also need to carefully clean and dry your plaster cast if you plan to make the work yourself. [substeps] If you are making your own plaster cast by hand, it isn't necessary to take it off your arms. Ending3: It's highly dangerous to do this process yourself, so have a friend ready to help you. [substeps] Plaster shears are safer than electric cutters. Ending4: The method should be practiced long distances in order to preserve a cast that you can trace. [substeps] Stores like walmart and nordstrom sell 100 plaster casts.

Answer format: ending1/ending2/ending3/ending4