Okay good, you have found:
x-intercepts: (-2,0), (-1,0), (1,0)
Now, can you answer parts a) - c) above? Can you use both the first and second derivative tests to clearly show what the nature of the extrema are? While one one of these test is sufficient, I think is is good in this case to look at both just for an understanding of both methods.
In the end, you will have two extrema, a point of inflection, and 4 intercepts, for a total of 7 points to plot...you will know where the function is increasing/decreasing, and where the function is concave up and concave down. You should be able to make a good sketch of the original function from all of this information.