Answer
See work below.
Work Step by Step
The first law is equivalent to the law of conservation of energy. The following ads describe devices that violate that law.
a. For sale: 200-watt air conditioner. Each second it will remove 300 J of heat per second from the house while exhausting 400 J to the outdoors.
b. For sale: Automobile with 150 percent efficient engine. Thanks to a secret catalyst that oil companies have been suppressing the knowledge of, one and a half times the energy available in a gallon of gasoline goes into turning the camshaft.