8. Flash memory has some of the properties of ROM (it retains its contents with the power off), and some of the properties of RAM (you can read or write to it). However most types of FLASH memory are slower when writing than when reading. Explain why. Hint: The answer may not be in the course slides, do some research. For this question you must provide web links for all references you used, or the slide set title and page number if you used my slides. Please write proper English sentences. [3 marks] Click here to enter text. 9. Why can clock speeds be higher on a serial bus than a parallel bus? Explain. For this question you must provide web links or the slideset title and page number for all references you used. [2 marks] Click here to enter text. 10. ARM SoC (System-on-Chip) devices for phones and tablets often use the AMBA bus architecture (Advanced Microcontroller Bus Architecture), which consists of APB and AHR sub-buses. [2 marks] Describe the purpose of AHB. Click here to enter text. Which one is used to connect input/output devices? Click here to enter text. 14. Given the following set of individual benchmark scores for each of the programs of the SPEC2000 benchmark suite, compute the arithmetic mean (AM) and geometric mean (GM) of each set. Calculate two overall speedup ratios: one using the arithmetic mean and the other using the geometric mean. Then decide which speedup you would consider to be a better indicator of the actual speedup. Note: For the scores given below a higher number is better. [5 marks] To answer this question use an Excel spreadsheet (Microsoft Office) containing appropriate data and formulas. Attach your spreadsheet file (.xlsx) when submitting your assignment. Note: Excel has function @geomean(..) that will calculate the geometric mean. AM Before: GM Before: Benchmark Score before improvement Score after improvement 164.gzip 175.vpr 176.gcc 181.mcf 186.crafty 197.parsar 252.com 253.perlbmk 254.gap 255.vortex 256.bzip2 300.twolf Enter value Enter value 13 17 26 39 12 15 28 21 33 20 10 41 AM After: GM After: Enter value 18 22 34 46 18 126 34 27 34 27 16 48 Speedup: Enter value Enter value Speedup: Enter value Which speedup value would you consider to be a better indicator of the true speedup? Why? Click here to enter text.