On the diagram below, draw the evolutionary track of the sun from the time it reaches the main sequence until it becomes a white dwarf. Label the major stages on this track. 
Definitions:
Chief Financial Officer
A senior executive responsible for managing the financial actions of a company.
Operating Leverage
A measure of how sensitive a company's operating income is to a change in revenues, indicating the extent to which a firm can increase profits by increasing sales.
Fixed Costs
Expenses that do not change in proportion to the level of goods or services produced within a certain period.
Variable Costs
Costs that vary directly with the level of production or service provision.
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