How do i stop my sister from being so disrespectful to my mom?

Today is mother's day and my sister always makes my mom cry and stress out. She calls my moms food gross and yells at her to shut up and name calls her so much. I try to help my mom but she just yells at me and says that my sister is nice she's just in a bad mood. She lets her do whatever she wants and doesn't do anything to stop her attitude but be nice and do whatever she wants. This upsets me so much, i hate seeing my mom like this. I just want to help but then she gets mad at me. I feel like a parent and i'm only a teenager, i have so much stress from my sisters attitude, i was never like her when i was little maybe because i didn't have an ipad when i was like 1 years old and grew up not watching all these stupid disrespectful youtubers. Someone please give me tips, i just want to help my mom. This child is so crazy, she screams from the top of her lungs when she doesn't get what she wants and cry's and cry's

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Phone is not working. Can you tell me what's wrong?

I have an iPhone 5, had it for years. The screen was falling off and everything. I dropped it, not the first, but this time the screen was black, a little illuminated but still black. I turned it off, hoping that would work but now I can't even see it illuminated. I plugged the charger in and it constantly makes the noise like it's being re-plugged in. (The charger is fine on my iPad.)I had a lot of information on it. By convenience someone had an extra phone of the same kind with considerably less memory space. I searched if I could put the information from the one phone to the other but it seems not. (?) Can someone tell me what's wrong with it at the very least? If it can be fixed and for how much? Or even if the memory from one phone can be switched to the other? (Remember it's an iPhone5) I really don't have the money to get it fixed but to help my curiosity at the very least.

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