Kids may recognize the two ciphers in the questionnaire if they have done other Mail Order Mysteries, but it is not necessary to solve them. You could look up “pigpen cipher” and “Templar cipher” if you want to find the answer keys, but if you are interested in doing other mysteries in the future you may want to leave them unanswered.
The cipher at the bottom of the page is a substitution cipher, and the key is directly above it.
The answer to the question is underlined in the spy brochure.