4.Address-register Sizes. An n-bit register can hold 2^n distinct bit patterns. As such, it can only be used to address a memory whose number of addressable units (typically, bytes) is less than or equal to 2^n. In what follows, I use power-of-two interpretations (and spellings) of Greek prefixes. I.e., KiB = 2^10 bytes, MiB = 2^20 bytes, etc. In this question, register bit sizes need not be a power of two. a) What is the minimum size of an address register for a computer with 9.375 GiBs of memory? answer = _____ bits b) What is the minimum size of an address register for a computer with 69.5 TiBs of memory? answer = _____ bits c) What is the minimum size of an address register for a computer with 1.05 EiBs of memory? answer = _____ bits d) What is the minimum size of an address register for a computer with 0.5 EiBs of memory? answer = _____ bits