I Have no Idea

I'm trying to solve these data communication problems. I couldn't care less for the data burst formula because I think my brain just ran away. any help is appreciated.

1. Suppose that data are stored on 800Kbyte floppy diskettes that weigh 1 oz each. Suppose that a Boeing 747 carries 10 tons of these floppies at a speed of 600 mph over a distance of 3000 miles. What is the data transmission rate in bits per second of this system?
2. What is the channel capacity for a teleprinter channel with a 300-Hz bandwidth and a signal-to-noise ratio of 3 dB?
3. A digital signaling system is required to operate at 9600 bps.
1. If a signal element encodes a 4-bit word, what is the minimum required bandwidth of the channel?
2. Repeat part (a) for the case of 8-bit words.
4. Given a channel with an intended capacity of 20 Mbps. The bandwidth of the channel is 3 MHz. What signal to noise ratio is required in order to achieve this capacity?
5. A telephone line with a bandwidth of 100 KHz is known to have a loss of 20 dB. The input signal power is measured as 0.5 watt, and the output signal noise level is measured at 2.5 microwatt. Using this information, calculate the output signal to noise ratio in decibel.