WITHOUT disturbing the normal operation of the logic gates.NMlow = VIL – VOLNMhigh = VOH - VIHCalculation:GIVEN voltage LEVELS are VIL = 2 V VOL = 5 V, VOH = 5 V, VIH = 3.5 VNMlow = VIL – VOL = 2 V – 1 VNMlow = 1 VNMhigh = VOH - VIH = 5 V – 3.5 VNMhigh = 1.5 V