How can we display value of fields like full name in Text field?

I would like to add the Name and Surname fields after the I but before the accept fields in the last text field of the form. I created condition 1 for this purpose, but am note sure you to display the values in that field. 

This is done through field tags.

The following guide will show you how to find the same: How to find Field IDs & Names

Now, in your case, to get the value of first name you would need to use the following code within Text field:

{name15:first}

as such, the following code is for the last name:

{name15:last}

If you simply do the following: {name15} you would get both first name and last name shown.

Now please do note that there is some trial and error with such setup, but we are here if you have any questions or issues, so just let us know :)

Hi Ben.

Thanks, this solved the issue.