Tamara was asked to determine whether f (x) = x - 247 is even, odd, or neither. Here is her work: Step 1: Find expression for f (-x) f (-z) = (-20)4-2(-2)2 Step 2: Check if f ( -x ) is equal to f (x) or - f (x) 24 - 2x2 is the same as f (z) - 24 - 2x2. Step 3: Conclusion f (-x) is equivalent to f (a), so f is even. Is Tamara's work correct? If not, what is the first step where Tamara made a mistake