Security questions - some show that they are required, others not

Hello,

We are utilizing security questions for a signer to answer before they can esign a document.  Only the first two questions actually tell you they are required, but in reality, we want all of the questions to be required.  How do we change that?  Also, can we change the wording instead of "This field is required."?

I have attached a screenshot of the questions.

Here is the code:

signerBuilder.challengedWithQuestions(
                        ChallengeBuilder.firstQuestion("Enter your First Name.").answer(signer.getFirstName())
                            .secondQuestion("Enter your Last Name?").answer(signer.getLastName())
                            .secondQuestion("Enter your date of birth using mm/dd/yyyy format.").answer(signer.getDateOfBirth())
                            .secondQuestion("What is your five digit ZIP Code?").answer(signer.getZipCode())
                            .secondQuestion("Enter the last five digits of your Social Security number").answerWithMaskInput(signer.getLastFourOfSSN()));