An input power of P = 3 W is fed to a 75 km conductor. A repeater is present at 40 km from transmitter and has a gain of 70 dB. The conductor has a of 3 dB/km. The power received at receiver side is:
(a) -140.23 dBm
(b) -120.23 dBm
(C) -110.23 dBm
(d) -150.23 dBm