Please I need help...

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1) List 5 uses of heaps

2) Define a d-ary heap

3) Define a complete binary heap

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1) How many steps to write to a file

2) How many steps to read from a file

3) What is found in the library

4) What is eof()

5) How do you write a string to a file

6) How do you write a char to a file

7) How do you write a line to a file