Hey all, I'm stack in this quiz of checking the style of fieldName if the first letter is 'm', the second is UpperCase

public class TeacherAssistant {

  public static String validatedFieldName(String fieldName) {
    // These things should be verified:
    // 1.  Member fields must start with an 'm'
    // 2.  The second letter in the field name must be uppercased to ensure camel-casing
    // NOTE:  To check if something is not equal use the != symbol. eg: 3 != 4
    if ( (fieldName.charAt(0) != 'm') && ( Character.isLetter(fieldName.charAt(1)) == true ) && (Character.isUpperCase(fieldName.charAt(1)) != true) ){
      throw new IllegalArgumentException("The fielName doesn't match the style");
    }
    return fieldName;
  }

}