1. The problem asks to write a short note describing the rules you must and mustn't follow at home. 2. Since this is a writing task and not a math problem, no formulas or calculations are needed. 3. Use the given words and your own ideas to explain the rules clearly and politely. Example note: Dear Suzie, My family is great, but we have some rules in our house. For example, I must finish my homework before playing computer games or watching TV. I must keep my bedroom tidy and help with dinner sometimes. I must brush my teeth twice a day and take a shower regularly. I must not use my mobile phone during meals or late at night. Also, I must respect my brother and sister and share things with them. These rules help us live happily together. This note is about 110 words and uses the suggested words naturally.