a. C. All the identification codes at a particular company consist of 8 characters, that are either upper case letters A-L, digits 0-6, or one of 8 symbols. How many codes begin with 5 letters followed by 3 nonletters, if no character is repeated? b. How many codes begin with 5 letters followed by 3 nonletters, if characters can be repeated? How many codes begin with 5 letters if no character can be repeated? d. How many codes begin with 3 letters, followed by 2 digits, followed by 3 letters, the last of which is F, and adjacent characters are different? How many codes have exactly 3 symbols, if no character is repeated? f. How many codes have exactly 3 symbols, all of which are adjacent, if characters can be repeated? g How many codes have exactly 3 symbols, none of which are adjacent, if characters can be repeated? h. How many different codes have at least one digit, at least twice as many symbols as digits and at least twice as letters as symbols, if no character can be repeated. e