Using the assembly$-$line balancing procedure, which of the following is the required cycle time in minutes of the line if the daily production time is $480$ minutes, the required daily output is $50$ units and the total task time is $105$ minutes?

$4\mathrm{.}57$

$9\mathrm{.}6$

$4\mathrm{.}8$

$104$

Cannot be determined from the information given