Answer:
answer below
Explanation:
a) will be all of them
b)will be all of their unions, so the values they all have in common in this case 4, 6
c)will be the values in common with a and b and all of c,
d)will be all of the values of a and b and all of the values in common with c
sorry I csnnot give an actual answer at the moment, but i can explain what each question wants from you in literal word form.