Where is the function f left parenthesis x right parenthesis equals x squared minus 4 x plus 4 increasing? Where is it decreasing? Question content area bottom Part 1 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The function is increasing on the interval enter your response here. (Type your answer in interval notation.) B. The function is never increasing. Part 2 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The function is decreasing on the interval enter your response here. (Type your answer in interval notation.) B. The function is never decreasing