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1. »ù±¾ÈÎÎñ: Convert the Excel formulas below to a single C# method that calculates Z to 4 decimal places using a for loop.
2. ½±ÀøÈÎÎñ: Describe or demonstrate a method to do the same calculation in parallel instead of using a for loop.

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Task ¡¡ ¡¡  
Convert the Excel formulas below to a single C# method that calculates Z to 4 decimal places using a for loop.  
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T 90 F  
Tc 352.260032 ¡¡ 
P 1200 psia  
Pc 662.858967 ¡¡ 
¡¡ 
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