3. We have three different baseband signals S1, S2, and S3, where S1 = 2sin(200t), S2 = 3sin(400t), and S3 = 4sin(600t). We would like to send all three signals at the same time using a. Amplitude modulation b. Frequency modulation c. Phase modulation 1. What is the bandwidth of each baseband signal 2. Assumes that the carriers used by S1, S2 and S3 are sine waves with frequency 2, 2, and 6 KHz, respectively. All the carriers have amplitude = 5. Draw the frequency spectrum of the transmitted signal for each type of modulation. Clearly label all the frequencies