Consider the parabola given by the equation: f(x)=4x214x10\displaystyle {f{{\left({x}\right)}}}=-{4}{x}^{{2}}-{14}{x}-{10}

Find the following for this parabola:

A) The vertex:  

B) The vertical intercept is the point  

C) Find the coordinates of the two x\displaystyle {x} intercepts of the parabola and write them as a list, separated by commas:
 
It is OK to round your value(s) to to two decimal places.