According to robert katz, which three skills do managers develop through education and experience?

Those three skills are:

Technical, refers to the expertise on relevant field for the managers. (for example manager of an drug company having expertise on microbiology)

Conceptual, refers to the capability for abstract thinking. Will be useful in creating long-term plan

Human or interpersonal management skills. Refers to the capaiblity to motivate all employees to make sure they fulfilled all goals.