Reference groups (types of groups and how they affect buyers behaviour and Decision making unite

Reference groups (types of groups and how they affect buyers behaviour
-and Decision making unite
• decision making rolls in family
• Define reference group (formal, non formal, aspirational, membership, negative)
• how they influence: information, aspiring
• Power: leader (french raven)
• Bedwden: influences,group, product)
• Csun: consumer senselessly to interpersonal influence
-exampls

Please talk about all the elements that I mentioned above
Also please use simple words easy to memories