Complete the treellevels table to analyze the following mystery algorithm in terms of the worst$-$case number of diamond operations $(0)$ performed.

Algorithm mystery$($L$)$

Input a List, L$,$ of n elements

Output $???????($this algorithm doesn't do anything useful$)$

if L$.$isEmpty$()$ then

return $0$

if L$.$first$()\%2$ is $0$ then

L$.$removeFirst$()$

return $10$ mystery$($L$)$

else

L$.$removeFirst$()$

return $20$ mystery$($L$)04$