help me with this question please i am so stuck! Bounded Depth First Search

For the questions concerning bounded depth$-$first$-$search $($DFS$)$ please answer the questions using the

following graph:

Which goal nodes are found in doing a branch$-$and$-$bound DFS to find an optimal solution? Assume that

when searching, when you encounter a node with two children you always examine the left child of a node

before its right child. List all the nodes discovered, in the order in which they are discovered. So$,$ for

instance, if you think that branch$-$and$-$bound DFS finds goal nodes R$,$ Y$,$ and U in that order but does not

discover goal nodes $Q,T,W,$ or $V,$ you would write

RYU

No spaces

Answer: RYUQTWV

Assume we do branch$-$and$-$bound DFS to find an optimal goal node. How many nodes total are examined

by branch$-$and$-$bound DFS$?$ Assume that this does not use iterative deepening.