$$\text { Find the value of } d ^ { 2 } y / d x ^ { 2 } \text { at the point defined by the given value of } t \text {. }$$

Multiple Choice

$$\text { Find the value of } d ^ { 2 } y / d x ^ { 2 } \text { at the point defined by the given value of } t \text {. }$$
- $$x = \csc t , y = 2 \cot t , t = \frac { \pi } { 3 }$$

A) $4 \sqrt { 3 }$
B) $- 6 \sqrt { 3 }$
C) $2 \sqrt { 3 }$
D) $- 4 \sqrt { 3 }$