(a) A quorum of a board is the lesser of:
(1) a majority of:
(A) the membership of the board under the bylaws; or
(B) if the bylaws do not provide the membership of the board, the membership of the board under the articles of incorporation; or
(2) the number, which must be more than two, set as the quorum by the articles of incorporation or the bylaws.
(b) An act of the majority of the directors present at a meeting at which there is a quorum is an act of the board, unless the act of a greater number is required by the articles of incorporation or the bylaws.