7. (12pts)Solve each of the inequalities below (if possible), and display the solution set threedifferent ways. If there is no solution, please write a 1-2 sentence explanation as to why. \text { (a) } 2 x+4 \leq 6 \text { (b) }\left|\frac{x}{2}-3\right|>5 \text { (c) }|x-3|+6<4