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

Multiple Choice

$$\text { Find the value of } d ^ { 2 } y / d x ^ { 2 } \text { at the point defined by the given value of } t \text {. }$$
- $$x = \tan t , y = 9 \sec t , t = \frac { 3 \pi } { 4 }$$

A) $- \frac { 9 } { 2 }$
B) $- \frac { 9 \sqrt { 2 } } { 4 }$
C) $9 \sqrt { 2 }$
D) $\frac { \sqrt { 2 } } { 4 }$