Aposition versus time graph is shown below.
a position versus time graph is shown with y-axis labeled position in meters north up to 20 and x-axis labeled time in seconds up to 10. a line connects points 0, 0 and 1, 4. a horizontal line connects points 1, 4 and 4, 4. a line connects points 4, 4 and 6, 10. a horizontal line connects points 6, 10 and 8, 10. a line connects 8, 10 and 9, 14, and then 10, 15.
use the graph to determine the average velocity in m/s of the object at the end of 4.0 seconds?
1 m/s
2 m/s
4 m/s
5 m/s

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.