2. Suppose a digital data signal b(t) is transmitted using Binary Phase Shift Keying (BPSK) modulation. a. If the digital data signal b(t) is NRZ binary waveform with bit rate of 1 Mbps and the modulation carrier frequency is 10 MHz, provide an approximate magnitude plot of the frequency spectrum. What is the required bandwidth of this BPSK modulated signal? b. What happens if you half the bit rate? Provide an approximate magnitude plot of the frequency spectrum.