Linux RedHat : sed Only

Copy the file https://pastebin.com/UwaAkLit File Name : continents

to your current directory. The file continents has a header line and an ending line of text. In between are lines about the 7 continents, where each line has 3 fields, with : as the delimiter.

Do the equivalence of: egrep America continents

Do the equivalence of: wc l lab3in | cut -f1 -d' ' (1 space between single quotes)

Do the equivalence of: tail -4 lab3in | head -2

Print the file continents, but with the numbers printed in the International System (SI) format.

English format: 2,001,000.50 SI format: 2 001 000,50

Print the file with all lines indented by 2 tabs

Print only the lines with the continent data, but with the population density of Antarctica changed to 20

Print the file with the 3 input fields in reverse order: field 3, then field 2, then field1. The reversed output fields should be separated by a tab