public static String execute(ArrayList participants, int number) {

return ;

}

Currently, it simply returns an empty string. It should however do the following:

Return a String that contains the name of each player (which meets the criteria noted below *) in the ArrayList participants in the format: "FIRSTNAME, surname", e.g. "JOE, bloggs", each followed by a new line. * only players whose gamertag contains their surname (regardless of case) as well as the int number passed as a parameter to the execute method.