Question

Gunther is filling in his own input mask. He wants to format the Social Security numbers of his clients. The field must contain values for the last four digits of a Social Security number, but the beginning five digits are optional. How would the input mask be properly formatted? as 999-99-0000 as 000-00-9999 as 999-99-9999 as 000-00-0000

Answer 1

Last one I am not sure they