What does the following function do?

```
int fun
(string a,
int k)
{
char blank = ' ';
bool looking = true;

while (k >= 0 && looking)
if (a[k] == blank)
--k;
else
looking = false;
if (looking)
return -1;
else
return k;
}
```
a. Finds the subscript of the first nonblank character in array a.
b.Finds the subscript of the last nonblank character in array a. c. Counts the number of nonblank characters in array a.
d. Finds the subscript of the first blank in array a. e. Finds the subscript of the last blank in array a.

b.Finds the subscript of the last nonblank character in array a. c. Counts the number of nonblank characters in array a.