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2. Write a program as below: a. Read the file test_mark.dat consists of 10 student's mark for Test 1 and Test 2, check if the

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2. Write a program as below: a. Read the file test_mark.dat consists of 10 student's mark for Test 1 and Test 2, check if the doesn't exist, display an error. b. Calculate the average marks of those students and save into new data file named average_mark.dat

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