Transfer Function on DC Motors $($BRD$)$

Figure shows the block diagram of a dc$-$motor control system. The signal $N(s)$ denotes the frictional torque at the motor shaft. Find the

transfer function $H(s)$ so that the output $Y(s)$ is not affected by the disturbance torque $N(s).$ Does symbolic function used in the program? $($Pretest$)$

is $E(s)$ equation defined on eq$1?$

is $Y(s)$ equation defined on eq$2?$

Does Solve equation $(1)$ for $E(s)$ placed on eq$3?$

Does Substitute equation $(3)$ into equation $(2)$ placed on eq$4?$

Does Set the transfer function, $Y\frac{s}{N}(s)=0$ and solve for $H(s).$ placed on eq$5?$

Does value of $G(s)$ placed on eq$6?($Pretest$)$

Does Express $H(s)$ in terms of the defined $G(s).$ placed on eq$7?$

COMPLETE THE CODE USING MATLAB CODE