Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to use the apple watch breathe app [title] Open the breathe app. [step] The icon is green and contains a white curved arrow. [title] Turn the digital crown to set the length of your exercise.

Ending1: [step] If you are within a set time range, tap the hour icon (an arrow symbolizes the hour and time sequence in milliseconds). [title] Tap the " breathe screen " app. Ending2: [step] When used properly, the app's duration is equidistant from the current duration of the exercise. The length of the exercise varies by model, but the maximum length for a human exercise week (or for the entire week) is one and six hours. Ending3: [step] The screen will also say " set time ". ( alternatively, use the latitude and longitude values in the run screen. Ending4: [step] You can choose from 1 to 5 minutes. [title] Move to a location where you can remain still and uninterrupted.

Answer format: ending1/ending2/ending3/ending4