What is the structure of a rearranged carbocation that does not have a four-membered ring in the following acid-catalyzed dehydration of the following compound? 
Definitions:
Modified Internal Rate Of Return
An adjustment of the Internal Rate of Return formula that rectifies its limitations by incorporating different reinvestment rates for cash flows received over the investment's lifetime.
Payback Period Method
A capital budgeting method that calculates the time required to recoup the cost of an investment, identifying the point where cash inflows equal cash outflows.
Profitability Index
A calculation used to assess the attractiveness of an investment or project, equal to the present value of future cash flows divided by the initial investment cost.
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