Please answer all questions.

Question 1 (1 point) Web crawlers build the index for pages using afirst traversal algorithm Save Question 2 (1 point) Sorting is mainly used for scheduling jobs from the given dependencies among jobs. One application is determining the correct order of evaluation of formulas in a spreadsheet. Save Question 3 (1 point) BitTorrent uses a first search to find all neighboring nodes Save Question 4(1 point) How many different possible topological orderings are there of the vertices in this graph? Cl Hint: a must always be first and f must always be last. Save