Given the transfer function, 2-5 D(z) E (2) E(z) (1 +2-1+z-2)2 a) Draw the block diagram of a direct digital program of D(z) using a minimum number of data storage units. b) Draw the block diagram of a cascade digital program of D(z). c) Draw the block diagram of a parallel digital program D(z) using a minimum number of data storage units. Given the transfer function, 2-5 D(z) E (2) E(z) (1 +2-1+z-2)2 a) Draw the block diagram of a direct digital program of D(z) using a minimum number of data storage units. b) Draw the block diagram of a cascade digital program of D(z). c) Draw the block diagram of a parallel digital program D(z) using a minimum number of data storage units