Based on the financial data provided in the materials, use Zhen Hua Company as the comparable entity. Evaluate the value (per share) of Sobright Company using the three different valuation-models: Price-to-earnings ratio (P/E) model; price-to-book ratio (P/B) model; and price-to-sales ratio (P/S) model, respectively. Besides, indicate the limitations of using P/B Model.

什么是矢状面、水平面和冠状面