$5.)$ Uniform Cost Search $($UCS$).$ When expanding, expand from left to right $($i$.$e$.,$ if a child has two nodes, add the one on the left to the fringe first$).$ Although you will need to use a priority queue and set $($to keep track of visited states$),$ you do not need to draw them here for points$/$correctness$,$ but you may want to draw them on scrap paper below to help. Fill in the blank with the information provided.