A requirement for a cipher is that every plaintext letter corresponds to a different ciphertext letter. If a and b are not relatively prime to n, does the affine cipher meet this property? If so, prove it. Otherwise, present a counterexample. Show your work.

3.2.5 suppose that we have an estimate ahead of time of how often search keys are to be accessed in a bst, and the freedom to insert items in any order that we desire. should the keys be inserted into the tree in increasing order, decreasing order of likely frequency of access, or some other order? explain your answer.

Acetylene is a gas which burns rapidly on its own, and is considered highly explosive. a) true b) false

For all machines-not just hammers- the user applies force force to the machine to the machine over a certain distance. a. input b. output c. duo d. none of the above