7. What general categories of functions are specified by computer instruction? 8. In a computer, what is a bus, and what does it connect? 9. What is the maximum directly addressable memory capacity in bytes, if the address bus is 16- bit? Assume each memory location is one byte. 10. Consider a hypothetical 32-bit microprocessor having 32-bit instructions composed of two fields, the first byte contains the opcode and the remainder is the operand address. a. What is the maximum directly addressable memory capacity in bytes? Assume each memory location is one byte. b. How many bits are needed for the program counter and the instruction register? 11. Briefly define the following states of an instruction execution as shown in Figure 3.6. a. Instruction address calculation b. Instruction fetch c. Instruction operation decoding d. Operand address calculation e. Operand fetch f. Data operation g. Operand store