Consider the markets for monitors, USB drives, central processing units, and Microsoft's Windows. Assume monitor manufacturers use advertising to differentiate their products, the market for USB drives is controlled by many firms selling similar products, only a few firms control a large portion of the market for CPUS, and Microsoft owns the copyright on Windows. Classify the market for each of the following computer goods and services as either monopoly, oligopoly, monopolistic competition, or perfect competition. Monopoly Oligopoly Monopolistic Competition Perfect Competition Monitors USB drives Central processing units (CPUS) Microsoft's Windows O O00