题目内容：

Dear Kate，

My birthday is coming this Sunday.I want to have a party at home in the morning.It starts at eight.Many friends are coming.Can you come to my party？Please tell me.

Yours，

Mary

Dear Mary，

Thanks for inviting me to your party.I'd love to go to your party.But I may be late for it.I have to meet my uncle at eight in the morning.I can get there at nine.

Yours，

Kate

根据信件内容，回答问题。

1.Whose birthday is this Sunday?

2.When and where will the party be?

3.Can Kate come to the party?

4.Why will Kate be late?

5.How long will Kate be late for the party?