What is the legal test for making a statement or writing before a legislative, executive or judicial proceeding?

(1) any written or oral statement or writing made before a legislative, executive, or judicial proceeding, or any other official proceeding authorized by law[ and] (2) any written or oral statement or writing made in connection with an issue under consideration or review by a legislative, executive, or judicial body, or any other official proceeding authorized by law . . . ." ( 425.16, subd. (e)(1), (2).) "'A defendant meets [his initial] burden by demonstrating that the act underlying the plaintiff's cause fits one of the[se] categories . . . .' [Citation]." (Navellier v. Sletten (2002) 29 Cal.4th 82, 88.)