Which aspects may an exchange include in its listing requirements? i. Publication of the imposition of a penalty. ii. Payment of costs by the person guilty of a contravention. iii. The power to exempt an issuer from some or all of the listings requirements. iv. That approval of listings is outsourced. (i) and (ii) only (i), (ii) and (iii) only (i), (iii) and (iv) only (iii) and (iv) only