public class CoverSheet {

    
    Public List<String> AttTo = new List <String>();
    AttTo.add('Test Pre-Cert');
    AttTo.add('Jim Waller Pre-Cert');
    AttTo.add('Eileen Fitzpatrick');
        
    public String[] To = New String[3];
    To.add('Pre-Cert Company');
    To.add('Regence Behaviorial Health');
    To.add('Blue Cross Federal');
    
}

What in the world am I doing wrong,   I have tried everything

Line 5: expecting a right parentheses, found 'Test Pre-Cert'