In the below picture, how many networks are there? * PCO Switcho PCS Aewitchi PCI PC6 PC2 Switch2 PC4 PC3 7 A signal travels from point P to point Q. At point P, the signal power is 200 W. At point Q, the power is 70 W. What is the attenuation in decibels? * 0.97 4.5 O 5.44 O 2.85

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