Nothing in this part—
(a) prevents a person from being held vicariously liable for a proportion of any apportionable claim for which another person is liable; or
(b) prevents a person from being held jointly and severally liable for the damages awarded against another person as agent of the person; or
(c) prevents a partner from being held jointly and severally liable with another partner for that proportion of an apportionable claim for which the other partner is liable; or
(d) prevents a court from awarding exemplary or punitive damages against a defendant in a proceeding.