Arequires that the cipher alphabet changes throughout the encryption process. a. monoalphabetic substitution cipher b. polyalphabetic substitution cipher c. quantum cipher d. alphanumeric shift cipher reason: _

Assume that there is a 4% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on three independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

What engine component is shown in the above figure?

Java the manager of a football stadium wants you to write a program that calculates the total ticket sales after each game