I am 16 years old and I have 5 siblings. First off, that's plenty right there. Second, they're all younger than me. When I come home from school, they are often very loud and I generally have quite a bit of homework and I can't focus when they are around, yelling, screaming, fighting, perhaps even playing nicely, just too loudly. They tend to just create general havoc. My dad isn't home till evening and my mom is often either gone or unable to deal with all of them at once and if she is focusing on one kid, others will make up for it.
What should be my course of action to get them quiet or study without hearing them?
Their ages is between 4 to 15 if it is required.