A company wants to manage its distribution network which is depicted below. Identify the supply, demand and transshipment nodes in this problem. 
Definitions:
Tablets
Portable, flat computing devices equipped with a touchscreen interface, designed for personal or professional use.
Stomach Acids
The concentrated hydrochloric acid present in the stomach that aids in digestion and destroys pathogens.
Bound Together
Connected or secured closely or tightly, often used to describe the relationship or linkage between objects, ideas, or entities.
Controlled Substance
is a legal term for drugs that are regulated by law, including prescription medications and illicit drugs, due to their potential for abuse or addiction.
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