Problems I. Variation on 11.3#4. J Suppose that the address of the vertex u in the ordered rooted tree T is 2.5.3.4.4 (a) At what level is v?[5 points b) What is the address of the parent of v?[5 points (c) What is the least number of siblings v can have? [5 points Answer only; no explanation needed. Answer only; no explanation needed. Answer only; no explanation needed. (d) What is the smallest possible number of vertices in T if v has this address? 10 points] Answer only; no explanation needed