Please, I want the solution in text format, not handwritten, for all paragraphs as well, and in the correct form. I want a correct solution, I do not want an explanation.

(a) What is a shift register? Draw a diagram for 4-bit shift register.

(b) Define counter, ripple counter, and synchronous counter. Also, draw the diagram of 4-bit binary ripple counter by using D, and T flip-flops.

(c) Write a comprehensive note on types of RAM, and ROM.