15. Delete_57_from the 2-3 tree below. You must do: (a) fill in leaf-nodes b) show the search path and show which node SPOT is pointed to; (c) mark the deletion; d) make necessary modification of spot's kids and update all necessary keys of the tree; e) draw the final tree only if your modification is very messy, not readable. (4) 27 57 12 32 70 -1 8 15. Delete_57_from the 2-3 tree below. You must do: (a) fill in leaf-nodes b) show the search path and show which node SPOT is pointed to; (c) mark the deletion; d) make necessary modification of spot's kids and update all necessary keys of the tree; e) draw the final tree only if your modification is very messy, not readable. (4) 27 57 12 32 70 -1 8