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Given Conditions:
The condition implies that

This indicates that is parallel to .
Expressing :
Calculate

Express :
Since is parallel to , let

Using the condition :
Compute

This simplifies to

Set , which gives .
Determine using :

Therefore,

Calculate :

Use the determinant form for the cross product:

Calculate the determinant:
For
For
For
Thus, .

Calculate the magnitude squared:

Find

Therefore, .

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