Usually, most retail chains buy products from their suppliers in huge quantities and then repackage them for sales. Lotus, Giants, and Mydin are to name a few such retail chains. Many outsource their products from other Asian countries such as Thailand, China, India, Bangladesh, Indonesia, and Cambodia. Discuss five (5) major channel functions of such retail chains and highlight the channel levels. Considering the environmental impact, these stores do not provide free plastic bags to carry the products during shopping. Instead, consumers are to buy plastic bags to discourage the use of single-use plastic bags. Provide your thoughts on how to consider reverse-flow channels for such single-use plastic bags. Answer in three (3) pages report.