If three dice are rolled under the condition that no two dice show the same face, then what is the probability that one of the faces is having the number $6?$

If $A$ and $B$ are two events such that $P\left(A\right)=0.6, P\left(B\right)=0.5$ and $P(A\cap B)=0.4,$ then consider the following statements

1. $P(\overline{A}\cup B)=0.9$

2. $P(\overline{B}/\overline{A})=0.6$

Which of the above statements is/are correct?