Write an email of about 80 words to your friend and give him/ her some advices. You can use the following questions as cues

Subject: A Little Advice for You

Hey Tom,

I hope you're doing well! I noticed you've been staying up late and spending too much time on your tablet. Just a heads up, staying up late can really mess with your sleep and affect your mood, while excessive screen time can strain your eyes and make it hard to focus. I suggest setting a bedtime and limiting your tablet use, maybe try reading a book before bed instead. Your health will thank you!

Take care,
[Your Name]