19. In the gure below, panel (a) depicts the linear supply curve of an individual rm in a competitive market. The textbook discusses why it is labeled MC. Panel (b) depicts the linear market supply curve for the market as a whole which has some unknown number of identical rms. (a) (b) Price Price Supply 2.00 2.00 1.00 1.00 100 200 Quantity Q1 02 Quantity Firm Market If at a market price of $1.75, 52,500 units of output are supplied to this market, how many identical rms are operating in this market? N =