Suppose we are given a set of tasks specified by pairs of start times and finish times as T = {(5, 6),(3, 7),(1, 2),(6, 8),(1, 3),(7, 9),(1, 4),(2, 5),(4, 9),(7, 10)}. Solve the task scheduling problem for these tasks.

Which of the following is not a source of sustainable raw materials? a) coal mine b) flick of sheep c) cotton plantation d) line forest.

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Write a program that asks the user to enter the name of an input file. if the file does not exist, the program should prompt the user to enter the file name again. if the user types quit in any uppercase/lowercase combinations, then the program should exit without any further output.