It entirely depends on what the questions are, but the most significant ones should be answered. That is not to say that you have to spell things...
Will vary depending on what you are trying to achieve, be it one page or fifty.
Deep characters are ones that are well-written, simple as. Even characters with extremely shallow values, or characters who experience emotions...
Evil has countless forms. Not every villain has to have a soppy story to justify their misdeeds...in fact, the very definition of ''evil'' will be...
Separate names with a comma.