B6. a) Figure B6 shows the output of shell command Is on directory /home/common. You may assume that directory /home/common is read-write-execute-able by all users. Note that user john is not a member of the test group. [student@stationX~]$ ls -li /home/common total 1 21216 -rw-r---- 1 12543 -rw-rw-r-- 1 student john 512 student test 86 Sep 30 21:08 report Sep 30 22:09 mydata Figure B6 i) What is the size of the file mydata in bytes? iii) Which users (other than root) can write into the file mydata? What is the i-node number of the file mydata? [4 marks]