hich docstring needs the following Precondition: len$($str$1)>=1$ and len$($str$2)>=1?$

Note: A precondition is something that must be true at the start of a function in order for it to work correctly

Question $8$ options:

def function$\_$a$($str$1$: str$,$ str$2$: str$)->$ bool:

$\text{'}\text{'}\text{'}$Return True if and only if str$1$ has a length that is less than or equal to str$2\text{'}$s length. $\text{'}\text{'}\text{'}$

def function$\_$a$($str$1$: str$,$ str$2$: str$)->$ bool:

$\text{'}\text{'}\text{'}$Return True if and only if str$1$ and str$2$ have the same first character and str$1$ and str$2$ have the same last character. $\text{'}\text{'}\text{'}$

def function$\_$a$($str$1$: str$,$ str$2$: str$)->$ bool:

$\text{'}\text{'}\text{'}$Return True if and only str$1$ and str$2$ are the same string. $\text{'}\text{'}\text{'}$

def function$\_$a$($str$1$: str$,$ str$2$: str$)->$ bool:

$\text{'}\text{'}\text{'}$Return True if and only if the number representing the length of s$1$ occurs in s$2.\text{'}\text{'}\text{'}$

def function$\_$a$($str$1$: str$,$ str$2$: str$)->$ bool:

$\text{'}\text{'}\text{'}$Return True if and only if str$1$ and str$2\text{'}$s have the same length. $\text{'}\text{'}\text{'}$