Both RISC and CISC processors have registers. Answer the following questions about registers. 

a. Is it true that a larger number of registers in any architecture is always better than a smaller number? 

b. What limits the number of registers that can be implemented by any ISA? 

c. What are the relative advantages and disadvantages of dedicated registers like the IA32 architecture compared to general purpose registers like ARM and MIPS? 

d. If you have an m-bit register select field in an instruction, you can't have more than 2^m registers. There are, in fact, ways round this restriction. Suggest ways of increasing the number of registers beyond 2^m while keeping an m-bit register select field.