In the first part I have to find $L1$ as a sublattice of $L2$, so i am assuming that no sides can probably be added in $L2$ in which case i can't find $L1$ in $L2$.

Need some help here .

Also in the second part, I know that I probably have to find two shaded dots that $join$ or $meet$ at the unshaded dot, but I can't find such a pair. Am I thinking along the right lines or is there some other way of doing the second part ?