4. Computer A: clock rate =1.5GHz , to execute a code the CPU time =9s We need to design a new computer B which executes the same code in: CPU time = 4s, and 1.3 x clock cycles of computer A What is the clock rate required for computer B ? 5. Explain the buses: data bus and address bus. 6. For a memory with 2n capacity, what is the size (number of bits) of the address bus