A metaphor is comparing two things without using the words like / as.
Example: He is an angel.
An extended metaphor is a metaphor that is extended over multiple lines. ( Mostly in poems )
Example: “All the world’s a stage, and all the men and women merely players; They have their exits and their entrances; And one man in his time plays many parts.”
3 and 4 I can't really do it, you'll have to do it yourself.
A simile is comparing two things using the words like or as.
Example: She is like an angel.