If a digitizied signal has the data rate as 40 Kbps, which one is true? O a. Signal Period: 1,25.10-4 sec Bit per sample: 4 O b. Signal Period: 1,25.10-5 sec Bit per sample: 5 O c. Signal Period: 2.10-4 sec Bit per sample: 3 O d. Signal Period: 2,5.10-4 sec Bit per sample: 5 O e. Signal Period: 3 msec Bit per sample: 8