Design a 4-stage bi-directional serial-in serial-out shift register using 74ls76 j-k flip-flops and nand gates. structure your design so that the data is shifted on the leading edge of the clock. verity the 4-stage bi-directional serial-in serial-out shift register using multisim. use a clock frequency of 1 hz, and use switches to manually toggle the inputs of the shift register to shift bits into the device. use a digital oscilloscope to examine the output waveforms of the shift register.