Convert a D'Arsonal Movement having a full$-$scale deflection current of $1mA$ and internal resistance of $50$ into a series type ohmmeter. The desired ohmmeter half$-$scale deflection is $8000.$ Given that the internal battery voltage used to operate the ohmmeter is $12V.$

$1)$Draw the Series type ohmmeter circuit.

$2)$Determine the value all unknown components.

$3)$Explain the main source of error disadvantage of this device and how to overcome it$.$

$4)$Determine the ohmmeter measurement range $($with acceptable accuracy$).$

$5)$Determine the measurement range can be measured practically.

$6)$convert the circuit in part $($a$)$ to parallel type ohmmeter. Mention the main disadvantage parallel type and where it is applied.