short c++ help

if(root != NULL) int rightSum = findSum(root-> right, depth + 1); int leftSum = findSum(root-left, depth + 1); cout key: if (depth != 0) cout key else return Consider following binary search tree: 19 17 21 14 7 15 12 The following code is called: findSum(root,e) Root is a pointer to the TreeNode whose key is 19. What is the output from cout? There is a single space between values that are printed to the terminal. Note, there are no intended errors in the code void fun(int n) iffn> 0) fun(n-1); printf("%d ", n); fun(n-1); else return; int main00 fun(3); return 0; What will be the output of the program? (Use a single space between numbers)