Kirsten tried to evaluate the expression \{12\times2-8\} \times 2{12×2−8}×2left brace, 12, times, 2, minus, 8, right brace, times, 2. her work is below. \begin{aligned} & \phantom{=}\{12\times2-8\} \times 2 \text{step }1: \quad& =\{12\times2\} - 16 \text{step }2: \quad& =24-16 \text{step }3: \quad& =8 \end{aligned} step 1: step 2: step 3: ={12×2−8}×2 ={12×2}−16 =24−16 =8 in which step did kirsten first make a mistake?