Write clearly the core mechanics for a traditional analog alarm clock.

The alarm clock possesses the following indicators: an hour hand, a minute hand, a hand indicating the time at which the alarm should go off, and a buzzer. It also has the following input devices: a knob to set the time, a knob to set the time at which the alarm will go off, and a two-state switch that arms the alarm when the switch is in one position and cancels it in the other. (Assume that it is an electric clock and does not need to be wound.)

Explain:

• what entities are needed inside the clock
• what processes operate within it, and
• what conditions and mechanics govern the functioning of the alarm.

(Explain the movement of the hands in terms of the passage of time not the workings of the clock.)