PLease help me using php api google blogger insert post many parameter

There is code gogole php api blogger v3

          $mypost = new Google_Service_Blogger_Post();
          $mypost->setTitle( $title ); 
          $mypost->setContent( '' );

          $opt = array(
            'fetchImages' => 
'https://i.ytimg.com/vi/VWc6MBFyABo/mqdefault.jpg',
            "labels" => "3d-movie"
          );

          $data = $blogger->posts->insert( $blogId, $mypost );

i want to insert post to LABELS and insert image. please help guide to 
coding.

Thank you






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