Research function return values | Computer Science homework help

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The code here tests a user-entered character and returns values  depending on whether the character is numeric, upper case, etc.  

Enter the code, note the output, and answer the questions below.

Here is what the output looks like.

Complete the sentence When the user enters the value of “a,”  for each of the following:

1. Why does isalum() return the value 2?

2. Why does isxdigit() return the value 128?

3. Why does islower() return the value 2?

4. Why does isupper() return the value 0?

5. Why does tolower() return the value 97?

6. Why does toupper() return the value 65?

7. Why does isspace() return the value 0?

8.Why does iscntrl() return the value 0?

9.Why does ispunct() return the value 0?

10. Why does isprint() return the value 2?

11. Why does isgraph() return the value 2?

Submission Instructions

Put your answers into a Word document. Paste your code and your  output into the Word document. Upload your Word documents and .c file