Create a function named findCharRange which takes two arguments; a string $($char array$)$ and pointer

to a range$\_$t structure.

This function findCharRange should search through the string argument and find the letter closest to

the start of the alphabet and place a copy of that character in the structure as the value of the start

field. It should also place a copy of the character from the string that is closest to the end of the string

in the structure as the value of the end field.

This function should ignore case and should ignore any character that is not an alphabetic letter.

If the string contains no alphabetic characters, then the values for start and end should be $0.($Literal

zero, not ASCII zero.$)$

The string may contain any valid printable character. It wont just contain alphabetic characters.

The character may be any valid printable character.

The values stored in the range$\_$t structure should ONLY be lower case letters regardless of the case of

the char found in the string.

For example,

range$\_$t range;

char str$[]="123+++$TesTTesTTesT$123"$;

findCharRange$($str$,$ &range$)$;

printf$("\%$c:$\%$c

$",$ range.start, range.end$)$;

Should return with range$$s start value as the character $$e$$ and range$$s end value as the character $$t$$

since the letter $$e$$ is in the string and is the letter that is closest to the beginning of the alphabet and

the letter $$t$$ is in the string and is the letter that is closest to the end of the alphabet. The output

would be:

e:t