Need an answer to this discussion question by Wednesday 2pm EST

How do the perspectives on competitive advantage differ when comparing brick-and-mortar stores to online businesses (e.g., Best Buy versus Amazon, Barnes & Noble versus Amazon, Old Navy versus Threadless; Nordstrom versus Zappos, and so on)? Make recommendations to brick-and-mortar stores as to how they can compete more effectively with online firms. What conclusions do you draw?