阅读短文，回答下面问题。
I'm Mike. There are five people in my family. My grandfather is 76 years old. He has gray hair. My
grandmother is 70. She has gray hair, too. My mother is a doctor. My father is a businessman. I'm a student.
I'm 11 years old. Next Sunday, we are going on a trip to Beijing. I hope we can have a good time.
1. How many people are there in Mike's family?
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2. How old is Mike's grandfather?
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3. Is Mike's mother a doctor?
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4. What does Mike's father do?
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5. What are they going to do next Sunday?
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