LInux Ubuntu -- Check device and partition information

a) Use ls -l" command to view device files in the /dev directory. How many files are related to hard disk devices and partitions? Display them.

b) Use df and du command to check disk usage.

c) Use the following command to view partition information. Examine the information presented.

i) fdisk -l

ii) parted /dev/sda print

d) Take a screenshot in which the second hard disk is displayed