An analog signal having frequency as 3,90 KHz is digitized with 8 bits and stored in a file. If the file size is 2,43 Mbit, which answer is correct? O a. Date Rate = 62,4 Kbps Duration of the Signal = 39 minute O b. Date Rate = 31,2 Kbps Duration of the Signal = 78 minute O c. Date Rate = 81,1 Kbps Duration of the Signal = 44 minute O d. Date Rate = 49,4 Kbps Duration of the Signal = 54 minute O e. Date Rate = 54,7 Kbps Duration of the Signal = 44 minute