SQL Security :: How To Set Permissions For A User On X And Y Schema

I need to provide a User with below permissions:

1. Ability to read and write records in tables in both the X schema and Y schema
2. Ability to read metadata about objects in the X and Y schema
3. Ability to execute stored procedures in the X and Y schema
4. Ability to create and update the necessary schema objects used by X, including but not limited to tables, views, and indexes
5. CREATE FUNCTION permission
6. ALTER and EXECUTE permissions on the X schema
7. VIEW DEFINITION permission on the X and Y schemas to enable view export. 

For the point 1, I will assign db_datareader,db_datawriter database roles to the user

For the point 2, when I have searched web, I found out ReadDefinition permission should be granted. I could find only viewDefinition but not ReadDefinition.

For the point 3, 'USE DataBaseName GRANT EXECUTE TO User; Go' - does this sql suffice?

For the point 4, I am not sure what should be done.

For the point 5, 'USE DataBaseName GRANT CREATE FUNCTION TO User; Go' - I guess this will work

For the point 6, Can I use same SQL as point 3 including ALTER ?

For the point 7, 'USE DataBaseName GRANT VIEW DEFINITION TO User; Go'