Fourteen years ago, sergio noticed that a lot of people who bought personal computers did not know much about how to use them and frequently suffered system crashes and other aggravations. he decided he could earn a nice profit by starting a consulting business to other people overcome their computer woes. although the business struggled at first, it has experienced a good deal of success for the past five years. sergio has many satisfied customers, and the business has grown to the point where he now employs several workers. sergio's experience is an example of:

The invisible hand concept

Explanation:

The invisible hand concept is a metaphor which describes the actions of a person who performs certain tasks for his own benefit but his actions also lead to being a help for the public or a society.

In the scenario, mentioned in the question, Sergio wanted to earn a nice amount of profit for himself by setting up a consulting business. In his effort to do this, he benefited the society by helping them with their computer problems. Hence, this is an example of invisible hand concept.  

they had freedom from the government and from the affairs