Write a function combine$($s$1,$ s$2,n)$ that takes as inputs two strings $s1$ and $s2$ and an integer $n,$ and

that returns a new string in which the first $n$ characters of $s1$ are followed by the last $n$ characters of $s2.$

For example:result: 'compence'

$>>$ combine$(\text{'}$python$\text{'},$ 'code', $2)$

result: 'pyde'

If either string $($s$1$ or s$2)$ does not have at least $n$ characters, you should use all of its characters:result: 'yougram'result: 'afterfun'

Write a function reverse$\_$last$($vals$,n)$ that takes as inputs a list vals and an integer $n,$ and that

constructs and returns a new list in which the last $n$ values of vals are reversed and all other values from

vals remain in their original positions. For example:

$>>$ reverse$\_$last $([1,2,3,4,5,6],3)$

result: $1,2,3,6,5,4$ # reversed the last $3$ values

$>$ reverse$\_$last $([1,2,3,4,5,6],4)$

result: $1,2,6,5,4,3$ # reversed the last $4$ valuesresult: $[10,20,40,30]$ # reversed the last $2$ values

If $n$ is greater than or equal to the length of vals, the entire list should be reversed:result: $[40,30,20,10]$quad#$6>=4,$ so reversed entire list