.13 (Fire alarm system.) Design a fire alarm system with the following specifications. The system has an on/off switch. The system works only if the switch is on. There is a smoke detector giving the output in three bits. When the smoke density is maximum, the output of the sensor is seven in the binary form. When there is no smoke detected, the output of the sensor is zero in the binary form. The alarm will be active if the output of the smoke detector exceeds four in the binary form. Implement the designed combinational circuit either in Verilog or VHDL