(1) If persons are sued as partners in the name of their firm (a) they are to appear individually in their own names; and(b) the action is to continue in the name of the firm.(2) A person served with a writ under rule 310(4)(b) is not to appear to the writ.(3) A person served as a partner may file a notice of conditional appearance denying that he or she is a partner.(4) A notice of conditional appearance does not preclude the plaintiff from otherwise serving the firm and obtaining judgment against the firm in default of appearance if no partner files a notice of appearance in the ordinary form.