$R_1=J_1=K_1=K_2=1$

$4$a: Assume

$T=14F=0$

$4$b: Assune

$T=0$&$,F=1$

$4e$: Assume

$T=1$&$F=1$

create a simulink model showing position, velocity and acceleration and free body diagram and equations plesae