The heating curve for a substance is shown below. The substance initially is a solid. It then becomes a liquid and a gas. Which of the line segments (I-V) represents the solid to liquid phase transition? 
Definitions:
Profitability Analysis
The process of reviewing and evaluating a company's ability to generate income (profit) relative to revenue, balance sheet assets, operating costs, and equity over time.
Horizontal Analysis
A method of financial analysis in which financial statements figures for a period are compared to those of the previous period to determine the changes in dollar amounts and percentages.
Liquidity Ratios
Financial metrics used to measure a company's ability to pay off its short-term liabilities with its short-term assets.
Dollar Amount Changes
Alterations in financial figures, reflecting increases or decreases in values such as revenues, expenses, assets, or liabilities over a period.
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