please solve

Check the Show Plot and Grid Lines boxes. What is the range of f? Use the interactive figure to find your answer. Use the left and right arrow keys to move along a slider as needed. Click here to launch the interactive figure. The range of f is . (Type your answer in interval notation.)Check the Show Plot box. On what open interval is the function decreasing? Use the interactive figure to find your answer. Use the left and right arrow keys to move along a slider as needed. Click here to launch the interactive figure. The function is decreasing on the open interval . (Type your answer in interval notation.)Use the graph to the right to evaluate each of the expressions. (a) (fog)(3) (b) (f o f)(1) (c) (g . f)( - 1) (a) (fog)(3) = (Simplify your answer.)