(linux)

sort this list:

Rory Williams, 82

Martha Jones, 87

Amelia Pond, 100

Rose Tyler, 98

Clara Oswald, 97

K9, 53

NOTE: sort has an option that allows you to use a different field separator. Like the option to reverse the sort order, you should be able to find this option on your own:

1. Read the man page (man sort), run sort --help, or look at sort usage online to look at some documentation for sort to find the option that allows you to change the field separator. Note that you will have to specify the option and an argument to the option, which should be a comma.
2. Run the sort command like above but with the additional option you found, and you should see the grades file sorted by increasing grade (K9, Rory, Martha,).

TAKE SCREENSHOT of the output of your sort command, showing the grades file sorted correctly.