Firstly, explain what the following code aims to do and then correct the bug in the code. $1$ int operation$($Node "node$)2.\{$ if $($node$)$ return $\backslash$theta ; else$\{$ int left $=$ operation$($node $->$ left$)$; int right $=$ operation$($node$->$ right$)$; return max $($left$,$ right$)+1$ ; $\}\}$ Your answer