I need help with this question. (Operating system)

(6%) Consider a hypothetical 32-bit microprocessor having 32-bit instructions composed of two fields. The first 6 bits contains the opcode and the remainder consists of an immediate operand or an operand address. 9, What is the maximum directly addressable memory capacity in bytes, assuming the system is byte- addressable? a) b) How many bits are needed for the program counter? c) How many bits are needed for the instruction register if the register is to contain the whole instruction