Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to wire cable tv [title] Decide if you want to install a modem in your cable tv system. [step] A modem provides internet service through your cable system. [title] Choose an in-line amplifier.

Ending1: [step] In-line amplifiers are available at electronic stores. Use an in-line amplifier if your splitter has more than 2 outlets or if you intend to expand the cable wiring in the future. Ending2: [step] An amplifier is a device, like a cable tv, under a faucet. The amplifier provides the same high power to your tv as a modem, but requires less power. Ending3: [step] If you plan to wire it, consider renting or buying an in-line amplifier to control the function and the signal of your cable tv. [substeps] The amplifier is a device that produces amplifications into an input in your television or mixer. Ending4: [step] This is the muscle that plugs into the cord above the tv. You can buy a built-in amplifier from an electronics store or your isp's local hardware store.

Answer format: ending1/ending2/ending3/ending4