pleases answer 9.1, 10.3, 10.10

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9.1 Why would DMA be useless if the computer did not have interrupt capability? 10.3 A multiplattered hard disk is divided into 1100 sectors and 40,000 cylinders. There are six platter surfaces. Each block holds 512 bytes. The disk is rotating at a rate of 4800 rpm. The disk has an average seek time of 12 msec a. What is the total capacity of this disk? b. What is the disk transfer rate in bytes per second? c. What are the minimum and maximum latency times for this disk? What is the average latency time for this disk? 10.10. A high-quality photographic image requires 3 bytes per pixel to produce sixteen million shades of color a. How large a video memory is required to store a 640 x 480 image during display? A 1600 x 900 image? A 1440 x 1080 image? A 2560 x 1440 image? b. How many 1920 x 1080 non-compressed color images will fit on a 4.7 GB DVD- ROM