3.08.02. The fees are fair and reasonable if they are warranted by the circumstances and correspond to the professional services rendered. In determining his fees, the advocate must in particular take the following factors into account:(a) experience;
(b) the time devoted to the matter;
(c) the difficulty of the question involved;
(d) the importance of the matter;
(e) the responsibility assumed;
(f) the performance of unusual professional services or professional services requiring exceptional competence or celerity;
(g) the result obtained;
(h) the judicial and extrajudicial fees fixed in the tariffs.