♥️♥️For new people ONLY PLZ♥️♥️ Have some free points. (plz dont take them if you have a lot. let some new people have this. tysm) PLZ BE HONEST. I CAN CHECK HOW MANY POINTS YOU HAVE

Assume that there is a 11% 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 four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?