Feedback? Challenge activities CHALLENGE ACTIVITY 3.3.1: Counting password possibilities. 402216.1927122.qx3zqy7 v Jump to level 1 Each character in a password is either a digit [0-9] or lowercase letter [a-z]. How many valid passwords are there with the given restriction(s)? 2 Length is 18 or 8. Ex: 26 * 36121 Write a as: a^b 2 3 4 5 Check Next Feedback? How was this section? 1 Q Provide feedback