Maths in Literature

A poem has a 4-line stanza where every line must rhyme with exactly one other line. How many different rhyme schemes can you create (e.g., AABB, ABAB)?

A play lasts 120 minutes. Act I and Act III have the same duration, but Act II is exactly twice as long as Act I (x + 2x + x = 120). How long does Act II last?

The tension in a story follows a pyramid structure. It rises linearly from 0 to a maximum of 80 points at minute 40, then drops linearly back to 0 at minute 60. What is the mathematical equation of the tension while it is dropping?

In a drama with 5 characters (A, B, C, D, E), Character A interacts with all other characters. Character B also interacts with C. The others do not meet. How many total connection lines exist between them?