Pick one design problem from the following list. Develop a design to solve the problem. Write up your solution and include sketches. Your design should not be more than one page or less than half a page. Submit as a pdf$.$

$1.$ Design a system for parks and recreation personnel that would alert them when trash barrels need to be emptied. Such a system would eliminate needless trips to check for full barrels.

$2.$ Design a system that will assist individuals in finding keys.

$3.$ Design a system that will assist flight attendants in feeding passengers on a wide$-$body aircraft without blocking the aisles with foor and beverage carts.