Null values - boolean expression

So I have a question in regards to an exam assignment, in this assignment we have a bunch of Boolean expressions like:

FALSE OR NULL = NULL

And then we are expected to write the value of the Boolean expression. To do this I am making use of the Three-valued logic, but how does that apply when you get a Boolean expression as follow:

(NULLL AND TRUE) OR FALSE

or

(NULL AND NULL) OR TRUE

The first one can easily be found through three-valued logic, but how do I figure out the other two.

Very basic question, I know, but I am still brand new to this.

Thanks in advance