database access

Luca is the database administrator for a city parks and recreation department. The department routinely uses community college interns to process applications and registration for the departments programs. It is important that the user interface minimize user input errors as much as possible.

A- Luca needs to use a VBA function in his code to return a value of True if the Paid field has no data or a value of False if the Paid field is not empty. Which VBA function should Luca use?

B- Because the event procedure that Luca is coding will only be used for the Participant Information form, the procedure is a(n) ____ procedure.

C- Luca wants to be sure that a message appears to the user prompting that an email be sent to all program participants reminding them of the date the program begins when the Paid field in the form is marked paid. What type of structure will Luca use to code an expression that tests the Paid field for an entry?

D- After creating the message control using VBA, which property of the control must be coded to display the message Email the participant with the start date of the program?