If $$2^x = 64  and  4^y = 256$$,then find the value of $$\left(\frac{1}{x}\right) + \left(\frac{1}{y}\right)$$.

A

$$\frac{2}{5}$$

B

$$\frac{5}{12}$$

C

$$\frac{2}{3}$$

D

$$\frac{7}{12}$$