Write a function

slice$\_$from$($string: str$,$ start: int, end: int$)->$ str

which returns the characters in string from index start up to$,$ but not including, index end.

Note that this characteristic of including the character at the start index, but excluding the one at the end index, is the default slicing behavior.

Write a function

reverse$\_$string$($string: str$)->$ str

which returns the characters in string in reverse order.

To obtain credit for the slice$\_$from and reverse$\_$string task, you must only use a single slice statement.