An analog signal having frequency as 3,40 KHz is digitized and stored in a file. If the total time of the signal is 20 min and the file size is 1,8 Mbit, which answer is correct? a. Bit = 6 bits Data Rate = 20,4 Kbps b. Bit = 7 bits Data Rate = 51,3 Kbps O c. Bit = 4 bits Data Rate = 31,7 Kbps O d. Bit = 6 bits Data Rate = 40,8 Kbps e. Bit = 5 bits Data Rate = 34 Kbps