Am nevoie de ajutor,dau coroana

II)
1. - raspuns corect a)
2. - raspuns corect b)
3. - raspuns corect c)
III)
1.
a) {1,2,3,4,5,6,7}
b) {1,2}
c {4,6,7}
d) {3,5,7}
2. X = {1,2,3,4} Y = {3,4,5}
3. A = {0,2,4} B = {0,2} . C = {3}