Please choose the correct ending to complete the given sentence: Youth: [header] How to get your homework done fast [title] Work in a comfortable, well-lit environment. [step] Try sitting at a desk in a padded, comfortable chair. Avoid doing homework on the floor or on your bed, because these areas are more likely to make you sleepy and distracted.

Ending1: [substeps] You may get some mattress softeners, as they can lower the insulin levels in your blood if you get them on your mattress. Avoid clicking the lights on when you are working on studying for an assignment, or watching tv, since they can make the process take longer. Ending2: Also make sure that you're working in a well-lit area so you don't have to strain your eyes to read. [title] Eliminate distractions by putting away your electronics and isolating yourself. Ending3: [substeps] Try not to look down while working, as this will make the paper go to waste. When you begin working in a room with a lot of light, try setting up a projector or monitor to help focus on the task at hand. Ending4: [substeps] Avoid hard surfaces like walls or tables, since these will also cast shadows and disrupt your sleep. Don't use lamps and overhead lighting since these are not adequate sources of light.

Answer format: ending1/ending2/ending3/ending4