A male is guilty of rape if, acting purposefully, knowingly, or recklessly regarding each of the material elements of the offense, he has sexual intercourse with a female under any of the following circumstances:
1) the female is less than 10 years of age;
2) the female is unconscious;
3) he compels the female to submit by force or by threatening her or another person with imminent death, grievous bodily harm, extreme pain, or kid napping;
4) he administers or employs drugs or intoxicants in a manner that substantially impairs the females ability to appraise or control her conduct.