Answer the following questions

$9M=3+2+1+3$

a$)$ Consider a computer system built using LC$-3$ architecture. This computer system consists of a RAM memory of $8KB$ capacity. Answer the following questions:

i$.$ What is the address space and addressability of the memory?

ii$.$ What is the number flip$-$flops needed to build the RAM memory system?

iii. When processor wants to read or write contents from$/$to memory, the address of the memory is placed in which register of the processor?

b$)$ What is the advantage of indirect addres $4$ mode compared to direct addressing mode? Explain with an example.

c$)$ Consider a system with cache, main memory and I$/$O device. It is possible for the CPU to read or write to the cache, while I$/$O device is reading main memory. Name the technique that is used.