$-$What are the transfer functions used in your system $($G$1,$G$2,$G$3$and G$4)?$

$-$Reduction of the roll system. How did you reduce the model according to block diagram reduction rules and what steps did you take $($i$.$e$.$the manual approach used$)?$

G$1($s$)=664/$s$^2+15\mathrm{.}08$s $+169$

G$1($s$)=$G$2($s$)=$G$3($s$)=$G$4($s$)$

PID$($s$)=$PID controller transfer function

do $=$Output disturbance

F$($s$)=$Sensor feedback transfer function, defined as: F$($s$)1/0\mathrm{.}0105$s$+1$