I have a CSV file, that contains people's Ages, First names, and Surnames. If an age is duplicated more than 7 times, how do I delete the Firstname and Surname from the file for that age?


15, Danial, Green
22, Neil, Hall
15, Phil, Sheen
17, Micheal, Snowfield
15, Peter, Davis
15, Simon, Scotland
77, Dave, Erin

*The 6th row (Shown in Red) should be deleted.