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Write down the following scenarios as examples of elastic, inelastic, or unit elastic demand.

a. When Ruko, a device used to stream movies at home, increases prices by 39 %, total revenue decreases by 55 %.
b. When Cinema Supreme decreases ticket prices by 5 %, total revenue does not change.
c. When Bluebox, a DVD rental kiosk, increases its prices by 44 %, total revenue increases by 31 %.