Answer:
Initiator, Influencer, Decider,Buyer,User, Gatekeeper
Step-by-step explanation:
Initiator: the person who first suggests or think of the idea of buying the particular product or service.
Influencer: A person who views influence or thinks of idea of buying the particular product or service
Decider: The person who ultimately determines any part of or the entire buying decision- whether to buy,what to buy,how to buy,or where to buy
User: The person (s) who consumes or uses the product of service
Gatekeeper: The person (s) who controls information or access, or both, to decision makers and Influencer.