For which purpose can you use the following function?

double mystery$($fstream& stream, int offset$)$

$\{$

stream.seekg$($offset$)$;

int result $=0$;

for $($int i $=0$; i $<mtext></mtext><mn>4</mn>$; i$++)$

$\{$

result $=$ result $+$ stream.get$()$;

$\}$

return result $/4\mathrm{.}0$;

$\}$

None of the listed items

To convert the value of the offset parameter to binary

To calculate and return an integer from the $4$ bytes at the offset position in a file

To calculate the average of four consecutive bytes read at the offset position in a

file