1. The problem is to write a short note to a friend describing the rules you have at home about what you must and mustn't do. 2. Since this is a writing task, not a math problem, the focus is on organizing ideas clearly and using the given vocabulary. 3. Here is a sample note using the words and ideas provided: 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. I must keep my bedroom clean and tidy. I must brush my teeth twice a day and take a shower every morning. I must help with my dinner sometimes. I am not allowed to use my mobile phone during meals or watch too much TV. Also, I must be kind to my brother and sister. These rules help us live happily together. 4. This note is about 110 words and uses the vocabulary given, explaining both what you must do and what you mustn't do at home. 5. Remember to write in a friendly tone and keep your sentences clear and simple.