Give context$-$free grammars for the following two languages:

$L_1=\{win\{0,1{\}}^{**}$:$w$ starts and ends with the same symbol $\}$

$L_2=\{win\{0,1{\}}^{**}$:$w=w^{R}is$ a palindrome $\}$

For $L_2$ note the subtle difference with $\{w{w}^R$:win$\{0,1{\}}^{**}\}.$