Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to do inclined sit ups [title] Find an incline bench. [step] This exercise will work best if you have a support bar, or foot brace, under which to hook your feet as well. [title] Set the decline angle.

Ending1: [step] If you are lifting the weight of your body, however, you can aim for a decline of a single degree. It is important that you stand at a 45 degree angle, keeping your arms square. Ending2: [step] Keep your feet shoulder-width apart and your forearms parallel to the ground. Your feet should be a comfortable width, with a slightly wider up or down angle depending on what you're doing. Ending3: [step] There are two 120 degree angles available to you. One degree angle will yield the most accurate results, but one will give you an inaccurate reading. Ending4: [step] You should start with an angle between 30 and 45 degrees. The higher the angle, the harder the sit ups will be.

Answer format: ending1/ending2/ending3/ending4