I am 23 years old considering hair transplantation.

Questions
1. How many grafts will I need to fill in the thinning or receding areas?

2. If I only get about 700-1000 grafts, will I still need to cut or shave all the hair from the donor area (i mean all hair from behind)? My hair is long about 10cm.

3. What about the recipient area, do I need to cut or shave that area too?

Thanks.