In this scenario, Donald's boss is guilty of Stereotype as thinks that all men who have long hair are not serious about their work.
Stereotype is a belief in which is unfair and untrue that many people have for the other people. For example:- Girls are considered to be weak ,innocent and polite and boys are considered as very strong and they never cry.
In the above scenario, Donald who is an investment banker is judged on the basis of his physical appearance. His boss has a Stereotype that all men who have long hair are not serious about their work.
Donald must be judged by his working skills rather than his appearance. Thus the boss is guilty about his Stereotype thinking.
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