The three flow graphs in Figure P6.41 are all equivalent implementations of the same two...

The three flow graphs in Figure P6.41 are all equivalent implementations of the same two input, two-output LTI system.

(a) Write the difference equations for Network A.

(b) Determine values of a, b, c, and d for Network B in terms of r in Network A such that the two systems are equivalent.

(c) Determine values of e and f for Network C in terms of r in Network A such that the two systems are equivalent.

(d) Why might Network B or C be preferred over Network A? What possible advantage could Network A have over Network B or C?