Check these, please!

[Anonymous]

Hi,
Please check if these sentences are correct and natural?
1. See you on the back nine. [When do we use this expression?]
2. I've been pretty busy lately with work and side work, so I've not been home much lately.
3. His mother is [mad at, angry with] him since he hasn't been home much lately. [Which is more natural, 'mad at' or 'angry with'?]
4. My daughter's not been home much lately. She is hanging around late (in the evening) everyday. / [They're, She's] at that age.
5. In case you (have) never heard of him and his stories, I will/can give you some details of his life.
6. Work and more work. When would (the) boss hire some more people, and could I have/take/get a vacation?
Thanks a million.
Ann

[Rusty]

1. See you on the back nine. [When do we use this expression?])(The back nine refers the last nine holes of an 18-hole golf course. Perhaps someone else knows the significance of "I'll see you there").
2. I've been pretty busy lately with work and side work, so I've not been home much lately. (OK).
3. His mother is [mad at, angry with] him since he hasn't been home much lately. [Which is more natural, 'mad at' or 'angry with'?](Both are common.
4. My daughter's not been home much lately. She is hanging around late (in the evening) everyday. / [They're, She's] at that age. (OK).
5. In case you (have) never heard of him and his stories, I will/can give you some details of his life. (OK).
6. Work and more work. When would/might/will (the) boss hire some more people,
and when could I have/take/get a vacation?