1. The following set of rules are provided <digit>::= 0|1|2|3|4|5|6|7|8|9| <digitorder>::=<digit>{<digit>} <sign>::= + | - <integer>::=[<sign>]<digitorder> Explain why each of the following integers is valid or invalid using these rules: a. 12345
valid - digitorder | integer
b. –1001
valid - integer
c. +3
valid - integer
d. 009
valid - digitorder | integer
e. –22
valid - integer
f. +/- 7
not valid - + /-
g. 3 + 8
not valid
h. –00
valid
i. -1
valid
2. Another language uses the following set of rules: <digit>::= 0|1|2|3|4|5|6|7|8|9 <letter>::= a|b|..|z|A|B|.. |Z <alphanumeric. ::= <letter>|<digit> <identifier>::= <letter><alphanumeric> Explain why each of the following identifiers is valid or invalid using these rules: a. OhNo b. Z1 c. x4 d. a b e. aa f. z?p
- Write these syntax rules in both EBNF and Railroad diagram.
- The letters of the alphabet are divided into vowels (A,E,I,O and U) and consonants (all letters).
<letter> = <vowel>|<consonant>
- A two-letter word must consist of either a vowel followed by a consonant or a consonant followed by a vowel.
Set 5A 1. D 2. B 3. | 