Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to program an rca rcr312w remote [title] These instructions come from the rca website. [step] The crucial step is to keep pressing the reverse button. [title] Turn on the component (the tv, dvd, etc).

Ending1: [title] Select which component you want to program. [step] Press the reverse " r " button. Ending2: [title] Press the tv (or dvd) button first and then the on/off button and hold both until the on/off button remains lit. [title] Press the play button every five seconds until the component turns off. Ending3: [title] Press the b/r keys to wake up the virtual operating system (mtu). [title] Select the component that you want to uninstall and press the' ok' button to continue. Ending4: [step] If you need to turn the unit to (off), check your own model id first. [title] Press the undo button, then press the rcr312w button once more.

Answer format: ending1/ending2/ending3/ending4