Prophets often use physical signs or symbolic names to declare their messages, so it's not only about words, but further illustrations. What is the...

1. Prophets often use physical signs or symbolic names to declare their messages, so it’s not only about words, but further illustrations.

a. What is the sign in Isaiah 7:14-16, and how does it help Hezekiah?

b. Two names get mentioned, one in Isa 7:14 and the other in Isa 8:3-4. What are they, and what do they mean (or, what is their significance)?