Graph the Function $y=-3 x^{4}+2 x^{3}+6 x^{2}-5 x+1$ Choose a Viewing Window That Shows Three Local Extremum Values

Essay

Graph the function $y=-3 x^{4}+2 x^{3}+6 x^{2}-5 x+1$
Choose a viewing window that shows three local extremum values and all the x -intercepts. Make a sketch of the grapher window, and show the viewing window dimensions.