Which of the following statements regarding the key concepts and characteristics of the Ajivika sect is/are true?

1. The Ajivika sect was an ancient Indian philosophical and ascetic movement that did not believe in karma and the notion of actions bringing about results.
2. The Ajivika philosophy holds that the nature of human existence is predetermined and follows an unalterable cosmic order.
3. Ajivikas considered rebirth a mere repetition of life, and Moksha (liberation) was possible only after many cycles of rebirth.
4. The founder of Ajivika is Makkhali Gosala, who was a contemporary of Gautama Buddha.