$2.)$ In the following exercise, the meter movement has full$-$scale values of $50$ millivolts, $1$ milliampere, and $50$ ohms of resistance. The shunt will permit the meter to have full$-$scale current values of $100$ milliamperes, $500$ milliamperes, and $1$ ampere. $[20$pts$]$

a$.$ Calculate the Resistance of the shunt $[$Rs$].$

b$.$ Calculate the Resistance of $[$Rshunt$1$ or Rsh$1].$

c$.$ Calculate the Resistance of $[$ Rsh$1$ and Rsh$2].$

d$.$ Calculate the Resistance of $[$Rsh$3].$

Note: When the Selector Switch is positioned to the different values $100$ milli amp, $500$ milli amp, and $1$amp. The Resistance within the circuit connection changes to Series or Parallel.