A $440$ V$,3-$phase AC motor has a power output of $11\mathrm{.}25$ kW and operates at a power

factor of $0\mathrm{.}8$ lagging and with an eefficiency of $84\%.$ If the motor is delta$-$connected,

determine $($a$)$ the power input, $($b$)$ the line current, and $($c$)$ the phase current.