Write a post describing a good or service that either a compliment or a substitute

*Be specific in describing what different goods or services serve as a possible substitutes or compliments for the good or service you choose.
*Give at least one specific example of a good or service that is either a substitute or compliment to the good you choose.
*Explain what will happen to the equilibrium price and quantity of the good you choose if the price of the compliment or substitute good increases.