Answer
(a) see figure.
(b) $(-\infty,-6]U[-2,\frac{4}{3}]$
Work Step by Step
(a) Based on the solution given in the previous exercise, we can graph the intervals as shown in the figure.
(b) In interval notation, we have the solution as $(-\infty,-6]U[-2,\frac{4}{3}]$