What's is tep? and define

Consider the demand for an inferior a good illustrated in the graph below suppose income decreases what effect would this have on the graph

Who was the redcoat leader (major john pitcairn, militias, ralph waldo emerson, concord, captain john parker)

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.