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

Multiple Choice

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

A) $- \frac { 1 } { 6 \sqrt { 6 } }$
B) $- \frac { 1 } { \sqrt { 6 } }$
C) $- \frac { 1 } { 6 }$
D) $\frac { 1 } { 6 }$