Program for calculating the sum of squares and cubes of natural numbers ,forming a board

Identify at least three types of characteristics that you were asked about as you the computer identify a fruit.

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?

Dameas communication challenge is due to which factor