A teacher received the following answer to a quiz question in which the student was asked to simplify the expression in Step 1:

n 1-5(x-16y)+i(-2x- 8y)

Step 2:-5x+80y-

Step 3: -5x-14x+80y-8y

Step 4: (-14x-5x)+(80y-8y)

Step 5:-19x+72y

Part A: Identify the step where the student made a mistake and explain the specific error that was made. Support your answer using the correct vocabulary (6 points)

Part B: How would you correct the mistake? Show all your work. (6 points)