Question $1.$

a$)$ Please find the transfer function of the following block diagram

b$)$ If the input signal $\backslash ($ r$($t$)=$u$($t$)\backslash ),$ please find the inverse Laplace transform for the output signal $\backslash ($ y$($t$)\backslash ).$

c$)$ What is the steady state error with the input above.