$2.$ Give regular expressions that describe the languages. In all parts, the alphabet is $\{0,1\}.(20$ points$)$

For the correct format, please check our examples in slides and use the following symbols: $0,1,,*,(),$ U$.$

$\{$w$|$ w starts with $0$ and has an odd length$\}$

b$.\{$w$|$ w starts with $1$ and has an even length$\}$