1-Modulation turns bits into waveforms or signals.a)Compare the power efficiency

1-Modulation turns bits into waveforms or signals.a)Compare the power efficiency and spectrum efficiency of some ofthe various PSK and FSK modulation schemes. Use some numbers (iefor bandwidth efficiency the number that represents bits/sec/Hzfor power efficiency the Eb/Nsub0 at some value of BER for thevarious modulations). b)On spectrum efficiency BPSK provides asmuch as (with perfect filtering r=0) 1 bps/Hz whereas QPSKprovides 2 bps/Hz why?2-AMPS cellular channels work over 30 KHz bandwidths andwork at SNRs of 18 dB. a) What is the maximum capacity possibleaccording to Shannon? b) Those channels have typically not beenused for data but only voice. Still some use of those channelsfor data (like signaling) have typically only provided at most tento twenty kilobits per second. Speculate (or explain) why that isso much lower than the Shannon capacity?