Regarding custom fields in the forms

Hi Author,
We are interested to purchase the plugin, but before that we need to ask some queries.
1) Is it possible to add custom fields in Employee application form from admin or from code.
2) Is it possible to add custom fields in job description form from admin or by code.
3) Could we add Teacher same like employee and allow to teacher to fill teacher application form.

We are waiting for your reply, your help will be appritiated.