Please choose the correct ending to complete the given sentence: Health: [header] How to gain weight during chemotherapy [title] Track your weight. [step] Since preventing weight loss is easier than trying to gain weight during treatment, keep an eye on your weight. Get on the scale at least three times a week.

Ending1: [substeps] Start with a set body mass index (bmi) of-12 or below-one of the most common and realistic weight-loss predictions. Bmi settings vary greatly depending on your type of treatment. Ending2: It's easy to lose track of how much you are losing when you are experiencing the side effects of chemotherapy. Your healthcare team will look for trends in your weight. Ending3: If you're treating your medical problem, you'll need to figure out how many calories and carbohydrates you typically weigh per day. Also, record how much weight you've lost over time and how often. Ending4: Make sure to record how much weight you want to lose and how much weight you are building up to gaining. When you notice any long-term effects from the chemotherapy, see if you can lose weight as you progress through treatment.

Answer format: ending1/ending2/ending3/ending4