A$1.($a$)$ Find the resistance and tolerance values if it has a colour code, from left to right, of "Red, Green, Orange and Silver" as shown in Fig. Ala.

Fig. Ala

$($b$)$ Referring to the circuit shown in Fig. A$1$b$,$ determine:

$($i$)$ the current flows through $4$ resistor; and

$($ii$)$ the voltage across $2$ resistor.