In the back office, go to the "clients" menu, then click on the name of the customer whose questionnaire responses you want to analyse.
In the "questionnaires" section you have access to all the questionnaires that have been assigned to this customer (via a meal plan, a sports programme or direct sharing).
To find out how to create a questionnaire, see this article.
If the customer has not answered the questionnaire, the message "To do" is displayed.
If the customer has answered the questionnaire, you can access their answers directly by clicking on "View answers".