Draw transition diagrams for DFAs that accept the strings described below.

1) Bit strings of even parity.

2) Bit strings s such that |s| mod 3 = 0.

3) Social security numbers. (eg 188-96-8890)

4) Programming language identifiers that begin with a letter followed by zero or more letters or digits.

5) Optionally signed decimal numbers with at least one digit on either side of the decimal point, and an optional exponent that begins with e optionally followed by a sign and at least one digit (for example, 2.33e ? 6).