4) Ocean Power, a printer manufacturing firm, sells ink cartridges for each of its specific models. Only Ocean Power cartridges are compatible with their printers, and no two models share the same specifications. Even if the Ocean Power printers are often priced low, the price of the Ocean Power cartridges is relatively high relative to the price of the printers. Originally, Ocean Power produced only printers and cartridges. Yet, through time, the brand has started offering a full line of keyboards, mouses and monitors. Nowadays, the Ocean Power branded keyboards, mouses and monitors are quite popular in the market. As a sales promotion, Ocean Power provides free samples of its keyboards and mouses to retailers to induce them to carry the Ocean Power products and promote them to their consumers. Based on this information, please name and briefly explain the pricing strategy, brand strategy and promotion strategy used by Ocean power. (20 points)