Take the following tree: 31 2 33 37 42 31, 33, 32, 42, 46, 50, 49, 74, 79, 80, 75, 60, 37 O 37, 32, 31, 33, 60, 49, 46, 42, 50, 75, 74, 80, 79 O 31, 32, 33, 37, 42, 46, 49, 50, 60, 74, 75, 79, 80 O 80, 32, 37, 42, 46, 31, 50, 60, 49, 33, 74, 75, 79 46 49 50 74 75 80 79 Perform a Post Order Traversal on the tree, listing the numbers in the order they will be "visited" in the traversal.

Q: Let a be an integer such that a = 4 mod 12. Use the definition of mod to prove that a² = 4 mod 12-

A: Solution-:                           a≡4 mod 12a2=(4)2 mod 12     =16 mod  12     =4   mod   12

Q: So would this be a disprove, i.e. there is no such function?

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Q: For all integers a,b,c if a|b and a|c then a|(b+c)

A:

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