I have purchase SSL for secure Site from Verisign. I have configured it and its working properly on https://www.example.com . I have subdomain app.example.com . i need to work SSL on this domain also. I have 2 Questions.

1- Will same SSL will work for the subdomain too? [My SSL is not wildcard SSL]

2- If it will not work. then how can i change the same SSL that it should only work on app.example.com. i mean is there any way to change purchased SSL for subdomain. and How can i do this.

https://www.example.com and http://app.example.com point to the same IP address xxx.xxx.xxx.xxx