Are surveys available in all Vtiger editions? How do I install the Survey module? What are the different survey types? What types of survey questions can I create? How do I create an internal survey? Can I preview a survey? How do I create an external survey? How do I send an internal survey link? How do I send an external survey link? How do I insert a survey link into the email body? How do I view survey responses? How do I add logic to a survey question? Why do I need to add logic to a survey question? How do I close a survey?