Problem $2$

Prove that the following languages are not context$-$free:

$L_1=\{\begin{array}{c}{a}^i{b}^j{c}^i{d}^j|i1\end{array}$ and $\{$:$j1\}$

$L_2=\{\begin{array}{c}x\text{\#}y|x\end{array}$ is a substring of $y,$ where $\{$:$x,$yin$\{a,b{\}}^{*}\}$

Please help me with the two parts. using th epumping lemma for context free languages for a contradiction might be helpful. Promise to thumb up$!$