英语作文 给你的朋友Jack写一封信 内容包括劝说Mike每天锻炼身体、多吃蔬菜、水果，保证充足的睡眠少吃

作文要求是不是写错了，为何是给Jack写信劝说Mike啊？
Dear Jack,
I heard that you don't have a healthy lifestyle. I think you should exercise every day. You must eat more vegetables and fruit. I know you like eating juck food, it is bad for your health, you should eat less. For sleeping, you should sleep nine hours every night. I think if you can do these , you will be in good health soon. What do you think of these ?
Yours
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