Taking the required channel bandwidth to be the first null of the rectangular pulse representing a 1 or 0 (plus for 1 and minus for 0), give bandwidths for the following data rates for a base band transmission system using non-return-to-zero encoding:

(a) 100 kbps;
(b) 1 Mbps;
(c) 1 Gbps;
(d) 100 kbps but split phase encoded;
(e) 100 kbps using non-return-to-zero encoding, but translated to a carrier frequency of 10 MHz.