For

$\sqrt[\phantom{2}]{1}=$dots

$($a$)$ The meshecuit, use mesh analysis to calculate.

$($b$)$ The pows current $i_1,i_2$ and $i_2$

$($c$)$ The currer in the $3{}_{\text{r}\text{e}\text{s}\text{i}\text{s}\text{t}\text{o}\text{r}{P}_1}$

Solution: I need the final answer