Nam had a wonderful holiday last summer. He was in Ha Noi, the capital of Viet Nam. He stayed at his uncle house for three weeks. He visited a lot of interesting places such as Uncle Ho's Mausoleum, Ba Dinh Square, West Lake, Lenin Park, etc. He bought some postcards for his friends and a cap with a national flag on it. Nam liked the cap much. He wore it all day. When he returned to Ho Chi Minh City, he spoke to his friend about his exciting vacation.
1: When did Nam have a wonderful holiday

2: Who did he stay with?

3: Where did he visit 

4: What did he buy for his friends?

5: Where is he from?

làm giúp vs ạ