If the binary operation * on the set Z of integers is defined by a * b=a + b - 5 , then write the identity element for the operation * in Z.

Explanation

To find the identity element for the binary operation defined by \( a * b = a + b - 5 \) on the set of integers \( Z \), we need to determine a value \( e \) such that for any integer \( a \):

\[ a * e = a \]

### Step-by-step Solution:

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