Given that Vs is $196$ V$,$ Is is $2\mathrm{.}25$ A$,$ R$1$ is $22$ Ohm, R$2$ is $40$ Ohm and R$3$ is $14$ Ohm, answer the following questions. You can use any appropriate network analysis technique to assist with the required transformations.

$($a$)$ Find Norton equivalent resistance $($RN$)$ with respect to terminals a$,$ b$.($Unit: Ohm$)$

$$Tries $0/8$

$($b$)$ Find Norton equivalent current source $($IN$)$ with respect to terminals a$,$ b$.($Unit: A$)$