A radio link uses a pair of 2m dish antennas

A radio link uses a pair of 2m dish antennas with an efficiency of 60 percent each, as transmitting and receiving antennas. Other specifications of the link are:
Transmitted power = 1dBw
Carrier frequency = 4 GHz
Distance of the receiver from the transmitter = 150 in
Calculate
(a) The free-space loss,
(b) The power gain of each antenna, and
(c) The received power in dBW.