Give regular expression for below languages$($assume alphabet to be $\{0,1\})$: $(10$ points$)$

i$)\{$w$|$ w begins with $1$ and ends with $0\}$

ii$)\{$w $|$ wevery odd position of w is a $1\}$

iii$)\{$w $|$ has length of at least $5\}$

iv$)\{$w $|$ w contains a substring $1100\}$