... this:array('country' => array('Spain', 'France', 'Argentina', 'UK','Germany', 'Canada', 'Austria', 'Mexico'),'language' ... value of an array's elements# prototype (returns a number or FALSE if an average cannot be calculated):# mixed array_average(array $array)function array_average($array){$retval = FALSE;if(is_array($array) ... 'Mexico'),'language' => array('Spanish', 'French', 'Spanish', 'English','German', 'English', 'German', 'Spanish'),'visitors'...