$($c$)(1$ point$)$ What is the value of current $i_{\text{@}}$ of the following circuit?

$($f$)$ points$)$ Calculate the voltage value $v_s$ of the following circuit.

$($g$)(1$ point$)$ Calculate current $i_x$ of the following circuit.

$($h$)(1$ point$)$ For the circuit shown below, calculate the voltage $v_x?$

$($i$)(2$ points$)$ Find the Thevenin equivalent resistance as seen from terminals a and $b$

Do all with workings please