Consider the parabola given by the equation:
$\displaystyle {f{{\left({x}\right)}}}=-{3}{x}^{{2}}-{6}{x}+{11}$

Find the following for this parabola:

A) Does the graph of the resulting parabola open up or down?

B) The vertex is at the point (,)

C) The $\displaystyle {y}$ intercept is the point (0,)