Repede, va rog!!! Dau coroana si 5 stele

1. [18,21,24}
2. a) {c,d}
b) {e,f}
3. a) 2,0,1
b)0,1,2,3
c)0,1,2,3
d) 0
Atat am apucat sa raspund scuze