Stats on subdirectories

Linux and Unix-Like Linux
1

Please help me with a shell script to get the stats on many subdirectories (sub1), (sub2) etc under a mother directory (big)

/big
|
|_______sub1
|_______sub2
|_______sub3

---------

I want to know

  1. What is the last file accessed in each subdirectory with date and by whom
  2. What is the largest file in each subdirectory, who owns it and when was it accessed/ modified last time

Thanks for your help in advance.

2

is it assignment ?

3

No, it is not an assignment, I need to do it for a user as our system admin is away on repat.