Show that the following languages $(=\{0,1\})$ are regular $($or not$)$:

$($a$)L_{3a}=\{\begin{array}{cc}{1}^{k}y|yin\{0,& 1{\}}^{*}\end{array}$ and $y$ contains at least $k1\text{'}$s$,$ for $\{$:$k1\}$

$($b$)L_{3b}=\{\begin{array}{cc}{1}^{k}y|yin\{0,& 1{\}}^{*}\end{array}$ and $y$ contains at most $k1\text{'}$s$,$ for $\{$:$k1\}$