You will use them to make using the first eight possible. DeMorgan's This is a very useful rule. Upon reflection you should be able to understand how to use it. In other words, they ate both not true. This will not work with a mixture of signs.
Distribution involves both 's and v's in the same statement.
There are three different components. One part is either inside the parenthesis with each of the other two or it is outside and separate from the parentheses. You can go back and forth between the two equivalences. Notice that the main connective always changes between an and an v. The other connective, then, is the one you put with the other components.