In the context of the four-tier pyramid system of customer categorization, match the customers (in the left column) with their characteristics (in the right column). Drag and drop application. The platinum tier customers The platinum tier customers drop zone empty. The gold tier customers The gold tier customers drop zone empty. The iron tier customers The iron tier customers drop zone empty. The lead tier customers The lead tier customers drop zone empty. They are heavy users of a product and are committed customers of a firm. They demand more attention than they deserve based on their spending and profitability. They provide the volume needed for a firm's capacity utilization, but their spending, loyalty, and profitability are not substantial. They are most likely to be heavy users who work with multiple providers to minimize risk