PLEASE ANSWER THIS AS FAST AS YOU CAN IT'S AN EMERGENCY

3. A system has the following specification: Percentage of instructions accessing memory 36% Main Memory Access Time = 30 ns Size of the L1 cache = 4 KB L1 cache hit rate = 60% L1 hit time = 0.6ns Size of the L2 cache = 10 MB L2 cache hit rate = 20% L2 hit time = 18ns Core frequency = 3.333GHZ Referring to the specification, what is the average memory-access time for the system? Show your calculations. [4 marks] 4. A main memory using a direct-mapped cache has the following specifications: Memory is byte addressable Memory addresses are 32 bits The cache has 8 rows Each cache row (line) holds 16 bytes of data . Referring to the specifications, how the 32 address bits are allocated to the offset, index, and tag parts of the address used to reference the cache. [2 marks] Offset bits Index bits Tag bits 5. Consider a fully associative mapped cache of size 512 KB with block size 1 KB. There are 17 bits in the tag. Find- and draw Size of main memory [2 marks] b. Tag directory size [2 marks] a