1. what are the main functions of the cpu? 2. how is the alu related to the cpu? what are its main functions? 3. how many bits are required to address a 4m * 16 main memory if a) main memory is byte addressable? b) main memory is word addressable? 4. how many bits are required to address a 1m * 8 main memory if a) main memory is byte addressable? b) main memory is word addressable? 5. how many 256 * 8 ram chips are needed to provide a memory capacity of 4096 bytes? a) how many bits will each address contain? b) how many lines must go to each chip? c) how many lines must be decoded for the chip select inputs? specify the size of the decoder. 6. suppose that a 16m * 16 main memory is built using 512k * 8 ram chips and memory is word addressable. a) how many ram chips are necessary? b) how many ram chips are there per memory word? c) how many address bits are needed for each ram chip? d) how many banks will this memory have? e) how many address bits are needed for all of memory? f) if high-order interleaving is used, where would address 14 (which is e in hex) be located? g) repeat this problem for low-order interleaving.