Question 3: A system with clock rate of 2.2 GHz will scans the status of an output I/O device every 50 ns through a timer alerting the processor. The interface of the device includes two ports: one for status and one for data output. Assume that all instruction cycles take 8 clock cycles. Calculate the time taken for the system to scan and service the device. Question 4: Given a system that only has a two-stage pipeline (fetch and dexecute). Draw the timing diagram to show how many time units are now needed for FIVE (5) instructions. Question 5: A hard disk with 4 platters has 1024 tracks/platter, 1024 sectors/track, and 512 bytes/sector. If the platter rotation speed is 15,000 rpm with 1 ms seek time for every 100 tracks traversed. Calculate the following: Total capacity of this hard disk The average seek time The average rotational latency The transfer time for a sector . The average access time