please help with study guide:

Chapter $5$ Understanding Organizations as Customers

$1.$ Business marketing

$2.$ Types of organizational buyers

$3.$ NAICS classification system

$4.$ Buying decision process for organizations $($know the stages and specifics about each stage$)$

$5.$ Characteristics of organizational buying$6.$ Derived demand

$7.$ Reciprocity

$8.$ Organizational buying criteria$9.3$ types of buying situations $($buy classes$)$

$10.$ Buying center and the roles in the buying center

$11.$ Traditional vs$.$ reverse auction

$12.$How the marketing mix differs for organizational customers