Active-Ingredients is a company supplying baking ingredients in major hypermarkets that are facing intense competition from many local and foreign brands. Active-Ingredients is thinking of using a television set as a point-of-sale (POS) display at selected hypermarkets to advertise the different ingredients they are selling and demonstrating different ways of baking using their ingredients. Design an experiment that determines whether the installation of the television set next to the advertised products increases the sales of Active-Ingredients products in the selected hypermarkets. Identify and diagram the experiment. Explain how the experiment is to be conducted and assess the validity of the experiment.