confuse in answering the vt app form

hi i have a few questions re the application of vt. I already have it and i dont know what to write there. I hope you could help me with it. Thanks. Here are my questions.

a. On page 2 of the form, where in they asked for the agency if i dont have any agency should i just leave it blank or put N/A on it?

b. On page 3 of the form, they are asking about the employment. I havent worked here on the Philippines. Should i just leave it blank or put N/A?

c. On page 4 of the form, they are asking about the child support. Im quite confuse re that. What should I answer there?

d. Still on page 4, regarding the taxes question #3 and 4. Should I just answer yes?

e. And the social security number? Should I just leave blank since I dont have a SS number yet?

f. Lastly, What is the form of payment? Can I send cash or if I will send a money order, where should I address it?

I know I have a lot of questions but I really hope you can answer it and I will really be thankful for that. I dont want to have a problem with the processing of my papers so I really want to make sure that everything will be correct. Again thank you and i'll wait for your response.