A

\[\frac{11\sqrt{3}}{4} u^2\]

B

\[\frac{7\sqrt{5}}{4}u^2\]

C

\[\frac{9\sqrt{3}}{4} u^2\]

D

\[\frac{2\sqrt{7}}{4}u^2\]

E

\[\frac{5\sqrt{2}}{4} u^2\]