It is the duty of the judge—
(a) to decide all questions of law arising in the course of the trial and especially all questions as to the relevancy of facts which it is proposed to prove and the admissibility of evidence or the propriety of questions asked by or on behalf of the parties, and in his or her discretion to prevent the production of inadmissible evidence whether or not it is objected to by the parties;
(b) to decide upon the meaning and construction of all documents given in evidence at the trial;
(c) to decide upon all matters of fact which it may be necessary to prove in order to enable evidence of particulars to be given;
(d) to decide whether any question which arises is for determination by him or her or for the jury and upon this point his or her decision shall bind the jurors.