What is the irony in the following quote?
MACBETH: “I drink to the general joy o' the whole table,
And to our dear friend Banquo, whom we miss;
Would he were here!
1. Macbeth misses Banquo.
2. Macbeth wishes Banquo was there because he is seeing his bloody ghost.
3. Macbeth is scared about what the future brings for himself and his country.
4. Macbeth is sad because he knows what he has done.