Brandon owns a radio electronics store. He has decided that selling in$-$home entertainment systems would be a great idea for his store. "Theatre in a box" users accounted for $45$ percent of annual sales in this market last year. They tend to provide steady year$-$over$-$year growth, but they represent the least loyal customers. After seeing this information, Brandon does more research to compare this segment to luxury buyers. Brandon is working on which step in segmenting the market?