1. Obtain a T flip-flop froma D flip-flop.
2. Determine the characteristics of the following sequential circuits:
3. Repeat the problemof Example 7.2 when
(a) NAND and NOT gates respectively have a delay of 4 and 3 units,
(b) gate delays are lumped together, and
(c) NAND and NOT gates have a delay of 4 and 3 units respectively assuming a lumped model.