6. One reason GUIs were initially slow to be adopted was the cost of the hardware needed to support them. How much video RAM is needed to support a 25-line x 60-row character monochrome text screen? How much for a 800 x 600-pixel 24-bit color bitmap? What was the cost of this RAM at 1980 prices ($5/KB)? How much is it now? (List where you found the price.) 7. Explain how first fit, worst fit, next fit and best fit works. 8. Four jobs are waiting to be run. Their expected run times are 6, 3, 5, and X. In what order should they be run to minimize average response time? (Your answer will depend on X.) 9. For a given class, the student records are stored in a file. The records are randomly accessed and updated. Assume that each student's record is of fixed size. Which of the three allocation schemes (contiguous, linked and table indexed) will be most appropriate? 10. For an external USB hard drive attached to a computer, which is more suitable: a write-through cache or a block cache? 11. How does "quick fit work? Why could it perform better than the other strategies? Why could it be worse