Question: Using Java file I/O to perform the following: a) Write a byte array to a .txt file after the first line of text in the

Using Java file I/O to perform the following: a) Write a byte array to a .txt file after the first line of text in the file b) Read an integer, double and character objects from a file. c) Calculate the number of spaces in a file. d) Considering that a file contains multiple records (rows), each row having fields name, rollNo and marks, calculate the average of the marks in all the records.

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