15%) which o ] Which of the following 9 statements (see**)cause com pil ati on or runtime ertors. class X class Y extends X class Z extends X Il the following statements ll creating references ril,r. Y r1 = new X(); X r2 = new Z(); Z r4- (Z) r; Y r5 (Y) o; Zr6-(Z) o; Zr7 = o; Object r8-y; Y r): (Y) r8; class Test public static void main(String argsD X x new XO; Y y = new Y(); Z z = new Z(); Object new Z(); Answer :The following statements cause compilation or runtime errors: Note: Just eference names) need to list