At a certain company, passwords must be from 3–5 symbols long
and composed from the 26 uppercase letters of the Roman alphabet,
the ten digits 0–9, and the 14 symbols !, @, #, $, %, ^, &, *,
(, ), 2, 1, {, and }. c. How many passwords have at least one
repeated symbol? d. What is the probability that a password chosen
at random has at least one repeated symbol?