When you create a section name in a man page, such as the DESCRIPTION section, what tag should you use just before the section name

Is a string of code written to hurt others by damaging or destroying

All of the following are characteristics that must be contained in any knowledge representation scheme except

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?