Q$5$: a hexagonal cell within a $4-$cell system has a radius of $1\mathrm{.}387$ Km $.$ a total of $60$ channels are used within the entire system. If the load per user is $0\mathrm{.}029$ Elangs and $=1$ call$/$hour$,$ compute the following for an erlange C system that has a $5\%$ probability of delayed cell. How many users per square kilometer will this system support?