What is meant by each of the following: universal set, awareness set, consideration set, inert set, and inept set?. Sociology

Universal set is the total collection of all possible solutions to a consumer problem (for example, the total number of brands of deodorant available on the market)

Awareness set includes, quite simply, the set of brands or alternatives of which a consumer is aware.

The consideration set of customers in order to learn about the total number of brands, or alternatives, that are considered in consumer decision making.

The inept set: alternatives in the awareness set that are deemed to be unacceptable for further consideration.

The inert set: alternatives in the awareness set about which consumers are indifferent or do not hold strong feelings