A city has an area of 1300 square miles and is covered by a cellular system using a 7- cell reuse pattern (assume hexagon cells). Each cell has a radius of 4 miles and the  city is allocated 40 MHz of spectrum with a full duplex channel bandwidth of 60 kHz.  Assume that a GoS of 2% is specified. If the offered traffic intensity per user is 0.03  Erlangs, compute

(a) the number of cells in the service area,  

(b) traffic intensity of each cell,  

(c) the total number of users that can be served at 2% GoS,  

(d) the number of mobiles per channel, where channels are reused and  

(e) the theoretical maximum of users that can be served at any one time by the system.