In a particular spreadsheet, the data in each cell is password protected. When cells are selected, the formula is visible in the formula bar. Which is true?
O The cells are locked and hidden.
The cells are locked and unbidden.
The cells are unlocked and hidden
O The cells are unlocked and unhidden

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?