4. (10 points) Applications are often times categorized as either computation bound or I/O bound. The former spends most of its execution time on computation, while the latter spends most of its time waiting for I/O (i.e. disk, network access, etc.). Use Amdahls Law to answer the following questions: (a) Suppose you have an application that spends 60% of its time waiting for disk access and 40% of its time on computation. Is this system I/O bound or computation bound? 1 (b) If you were to run this application on a processor that is 20x faster but with the same I/O speed, what would be the potential speedup? (c) If instead, you ran the application on a system with the same processor speed but a disk that is 3x faster, what would be the potential speedup? (d) Describe how you might go about improving the disk access of this system.