1. Morgan has to choose from several cameras located at Sammy's Camera in Los Angeles. Each is priced according to specific features: zoom lens, built-in tripod, "guitar-like" straps, the works! She noticed that certain models seem to fly off the shelves every time she visits the store and, what's more, they're pretty expensive to boot! She can't understand why... Illustrate and explain what could be occurring here given the demand for these models.