A 4-digit password is randomly generated so that each 4-digit number is equally likely to be generated. Recall that the digits are {0, 1, 2, ...,9) (0 could be the first digit of the password.) Let a be the probability that a password without any even digits is generated, and y be the probability that the password generated starts and ends with an odd digit. Which of the following is true? Select one or more: Ob.