请阅读有关一个学生的自我介绍的短文，根据所提供的信息，回答5个问题，要求所写答案语法正确，语义完整。

Good morning! My name is Jack Brown. I am from America. I am 13. I'm in Class One, Grade Seven. My telephone number is 577-9844. Liu Yang is my good friend. Liu is his last name. Yang is his first name. He is 12. He is from China. His telephone number is 854-6745. He has a new school bag. It's green. It's his favorite color.