Question 5: (30 marks) Assume a system's memory has 4M words. Blocks are 64 words in length and the cache consists of 512 blocks. 1- How many blocks are there in the main memory? (3 marks) 2- Draw the format of the memory address as seen by the cache, showing the fields as well as their sizes, for the following schemes: (19 marks) a- Direct Mapped Cache. b- Fully associative cache mapping scheme. C- 8-way set associative cache mapping scheme 3- For the Direct map scheme, to which cache block will the memory reference A412B map? Show your work (6 marks) 4- For the Fully Associative scheme, to which cache block will the memory reference 8214B map? (2 marks)