Solve and graph the absolute value inequality: |4x + 1| ≤ 5.
a. number line with closed dots on −1.5 and 1 with shading going in the opposite directions.
b. number line with open dots on −1.5 and 1 with shading in between.
c. number line with closed dots on −1 and 1 with shading in between.
d. number line with closed dots on −1.5 and 1 with shading in between.