[6]. Figo indicates a possible arrangement for using an error signal to control the movement of a potentiometer arm. The solenoid produces a magnetic force proportional to the current in the coil, that is, f = K i where i is the change of current from the equilibrium condtition. a) Draw a block diagram showing all variables explicitly. b) Determine the transfer function for each block. X(S) c) Determine the transfer function E(S) [7]. For the system shown in Fig.7, find the transfer function e, (S ) E, (S) V newton.m v.rad Where Kaand Ka are in K, is in and K, and K, are in amp amp sec