In C plz. Thanks in advance!

v // Modify the UTF-8 string 'utf8str to invert ONLY the FIRST UTF-8 character (which may be up to 4 bytes) // in the string if the first character is an emoji. At a minimum: // Invert @" U+1F60A ("\xF0\x9F\x98\x8A") into a non-smiling face. // - Choose at least five more emoji to invert. v void emoji_invertChar(char *utf8str) { } v // Modify the UTF-8 string 'utf8str to invert ONLY the FIRST UTF-8 character (which may be up to 4 bytes) // in the string if the first character is an emoji. At a minimum: // Invert @" U+1F60A ("\xF0\x9F\x98\x8A") into a non-smiling face. // - Choose at least five more emoji to invert. v void emoji_invertChar(char *utf8str) { }