it's a process control an Instrumentation based problem please solve it

5. Construct the block diagram of a feed back control system comprising an integrating level process, a P controller with gain Kc and a final control element with gain 1. For a unit step change in set point, determine the offset exhibited by the system(assume disturbance is zero). (N.B. Integrating system has a transfer function of the form 1/s ) 3