4. Draw the timing diagram of O for the positive-level triggering S.R Flip Flop for the given J and K signals (assuming the period of the clock is smaller than the total propagation delay). CLK 5. For the following shift-left register, determine Qo. Qi, Q2. Qs according to the following clock and Do. Q3 D3 Q2 D2 Q1 D Din NUL CLK ?????????? Do Qo Q1 Q2