If you are experienced enough in PL SQL, develop your PL SQL and create a SQL Report in APEX page.
For example the values of your retrieved checkboxes is 0 for 'N' and 1 for 'Y'
Then go into column attributes of SQL report, select the column and change the 'Display As' setting to 'Simple Checkbox' and provide LOV values as customizable.
Its pretty straight forward. Do it for all the 3 columns.
P.S. If you dont want to do any future action on checkboxes, there will be no need of using APEX_UTIL.CHECKBOX2 utlitity.
Message was edited by: Sunil Bhatia