For the block diagram shown in figure, the transfer function $${{C\left( s \right)} \over {R\left( s \right)}}$$ is equal to

The block diagram of a control system is shown in Fig. The transfer function $$G(s) = Y(s)/U(s)$$ of the system is

For block diagram shown in Figure $$C(s)/R(s)$$ is given by

The signal flow graph of Fig. shown below, has ___________ forward paths / and ________feed - back loops.