$8.$ What is the takt time for a system where the total time per shift is $480$ minutes, there is one shift, and workers are given two $15-$minute breaks and $30$ minutes for lunch. Daily demand is $285$ units. $($Select just one option$)$

$($a$)$ Takt time$=1\mathrm{.}47($about $2)$ products per minute

$($b$)$ Takt time$=1\mathrm{.}47$ minutes per product

$($c$)$ Talk time$=1\mathrm{.}47$ seconds per product

$($d$)$ Talk time$=0\mathrm{.}67$ minutes per product

$($e$)$ Takt time$=1\mathrm{.}47($about $2)$ products per seconds

$($f$)$ Takt time cannot be calculated based on this data