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1) Write a sed command to change all the functions from V1 to V2.
Q1 answer: 


2) Write a sed command to remove all single line comments starting with TODO or FIXME.
Q2 answer: 


3) Write a sed command to print all lines starting with extern.
Q3 answer: 


4) Write a sed command to replace all include statements using "" with <>.
Q4 answer: 


5) Write a sed command to remove the main method.
Q5 answer: 
