John has made a career of stealing older people's retirement money by taking advantage of their trust and selling them phony retirement investments. john explains that he has done nothing wrong—if these people were not so greedy, they would not be so eager to invest in his phony schemes. in his mind, his victims got exactly what they deserved. john's behavior and attitude are typical of someone with personality disorder.

John's behavior and attitude are typical of someone with "antisocial" personality disorder.

Explanation:

A mental condition in which an individual have no sense of right and wrong and also have no respect for others feelings, this is known as antisocial personality disorder. People who suffer from antisocial personality disorder manipulate and harshly treat others and they never have no embarrassment for treating someone like this. These individuals also have no respect for laws.

b. take periodic breaks and alternate between tasks.  

will increase work efficiency, and avoid health issues.

answer; break-even analysis;