Section 7 - Facts necessary to explain or introduce relevant facts.

Facts-

(a) necessary to explain or introduce a fact in issue or relevant facts;

(b) which support or rebut an inference suggested by a fact in issue or relevant fact;

(c) which establish the identity of anything or person whose identity is relevant;

(d) which fix the time or place at which any fact in issue or relevant fact happened; or

(e) which show the relation of parties by whom any such fact was transacted, are relevant in so far as they are necessary for that purpose.