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Help with the following please: (a) Suppose a computer has a maximum memory size of 4MB. What is the needed address field width?

Help with the following please:

(a) Suppose a computer has a maximum memory size of 4MB. What is the needed address
field width?
(b) Suppose a computer has an opcode field of 9 bits. What is the maximum number of
instructions in its instruction set?
(c) If a computer has an average memory access time of 10 nsec, and an average cache
memory access time of 2 nsec, and the cache hit rate is 50%, then what is the overall
average access time?
(d) Assume you have a list of 50 numbers, each of which takes 32 bits to store. The first
number in the list is stored at memory address 80376210 in computer memory. What is
the memory address of the first memory location after the last number in the list?

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