Question: How many six bits strings are there that begin and end with a 1, or start with 00? How many strings of length five or

  1. How many six bits strings are there that begin and end with a 1, or start with 00?
  2. How many strings of length five or six start with a 1?
  3. 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)? Length is 16.

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