Assertion (A): If minimum phase system has a gain margin of 8 dB and phase margin of 21°, the system is stable.

Reason (R): For a minimum phase system both GM and PM must be positive for the system to be stable.

Match the following:

1. An array has a fixed predetermined number of components.
2. Any component of an array can be accessed using an index.
3. An array variable name refers to a group of quantities by a single name.
4. When array variables are used an appropriate declaration is required.