A house has two lights to illuminate the stairs leading from thehall to the upstairs landing. The
lights can be switched OFF and ON by either one of two switches,one in the hall and one in the
landing. The lights are to be OFF when both switches are either ONor OFF together, and the lights
are to be ON when one switch is ON and the other is OFF.
i. Obtain the truth table of the system
ii. Obtain the sum of products (SOP) Boolean expression for thesystem.
iii. Implement the system using AND, NOT and OR logic gates.
iv. Implement the system using exactly ONE logic gate