P , Q and R represent switches in 'on' positions and P',Q' and R' represent switches in 'off' positions.Construct a switching circuit representing the polynomial PR+Q(Q′+R)(P+QR).Use Boolean algebra to prove that the above circuit can be simplified to an expression in which,when P and R are 'on' or Q and R are 'on',the light is on.Construct an equivalent circuit.
