4. () 3] What is a shift register? ()10] Draw a 4-bit shift register with parallel load. (ii) [7] Briefly mention the operation of the 4-bit shift register with parallel load. 5. () 3] What is the difference between a ripple counter and a synchronous counter? 2 You are asked to design a synchronous counter that will count the sequence 0>2>7>0. Represent these decimal numbers in 3 bits binary numbers (il) (2] Draw the state diagram of the synchronous counter. iv) [3] Give the state table of the synchronous counter (v) (6) Find the functions for the next state of the state table using K-map. (vi) [4] Draw the synchronous counter (You need to consider D flip-flops as memory unit)