Update wp-pro-quiz field in mysql database

I have a Google appscript to update values in the answer_data field of the wp_wp_pro_quiz_question table in the wp-pro-quiz database. The value in this field is a JSON encoded string. Below is an example. I have tried to update the field value using this JSON value but it doesn't work. I am able to update other fields in this table. I need someone to provide to me working Google Appscript code to update the answer_data field. To do this, you will need: 1. Wordpress 2. WP Pro Quiz Plug-in 3. Google Appscript code I can supply the code I have to connect to the database to update the other fields, but you will need to get this working using your own database. a:5:{i:0;O:27:"WpProQuiz_Model_AnswerTypes":7:{s:10:"*_answer";s:33:"A. Standard pages are part of MVC";s:8:"*_html";b:1;s:10:"*_points";i:1;s:11:"*_correct";b:0;s:14:"*_sortString";s:0:"";s:18:"*_sortStringHtml";b:1;s:10:"*_mapper";N;}i:1;O:27:"WpProQuiz_Model_AnswerTypes":7:{s:10:"*_answer";s:36:"B. Visualforce pages are part of MVC";s:8:"*_html";b:1;s:10:"*_points";i:1;s:11:"*_correct";b:0;s:14:"*_sortString";s:0:"";s:18:"*_sortStringHtml";b:1;s:10:"*_mapper";N;}i:2;O:27:"WpProQuiz_Model_AnswerTypes":7:{s:10:"*_answer";s:29:"C. Components are part of MVC";s:8:"*_html";b:1;s:10:"*_points";i:1;s:11:"*_correct";b:0;s:14:"*_sortString";s:0:"";s:18:"*_sortStringHtml";b:1;s:10:"*_mapper";N;}i:3;O:27:"WpProQuiz_Model_AnswerTypes":7:{s:10:"*_answer";s:33:"D. Custom Objects are part of MVC";s:8:"*_html";b:1;s:10:"*_points";i:1;s:11:"*_correct";b:0;s:14:"*_sortString";s:0:"";s:18:"*_sortStringHtml";b:1;s:10:"*_mapper";N;}i:4;O:27:"WpProQuiz_Model_AnswerTypes":7:{s:10:"*_answer";s:26:"E. All Statements are true”;s:8:"*_html";b:1;s:10:"*_points";i:1;s:11:"*_correct";b:1;s:14:"*_sortString";s:0:"";s:18:"*_sortStringHtml";b:1;s:10:"*_mapper";N;}}