If A and B  are 3×3  matrices and |A|≠0,  then which of the following are true?

For |AB|=0   ⇒   |A|  .  |B|=0   ⇒   |A|=0,   |B|=0       AA−1=I       ⇒    |A|  .   |A|−1=|I|=1   ⇒       |A−1|=1|A|=|A|−1