Give CFG that generate the following languages:

f$)$ L$7$ is non palindrome language over $\{a,b\}$

g$)L=\{\begin{array}{c}w\text{:}w\end{array}$ has twice as many $a^{\text{'}}s$ as $\{$:$b^{\text{'}}s\}$

h$)$ aibj

$i=3j+2$

i$)$ length of $w$ is even