If the equation of the base of an equilateral triangle is $x+y=6$ and the opposite vertex is the point $(-1, -1)$,then the area of the triangle is equal to $k$ sq. units. Find the value of $k$.

  • A
    $\frac{8}{\sqrt{3}}$
  • B
    $32\sqrt{3}$
  • C
    $\frac{32}{\sqrt{3}}$
  • D
    $16\sqrt{3}$

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