$($a$)$

the total impedance $($in $)$

$$

$($b$)$

the phase angle between the current and the emf $($in rad$)$

rad

$($c$)$

Write an expression for i$($t$).($Use the following as necessary: t$.$ Assume

i$($t$)$

is in amps and t is in seconds. Do not include units in your answer.$)$