We find a binary system consisting of a 1 solar mass star, still in its main sequence phase, and a white dwarf. Assume both stars formed at the same time and that they did not significantly influence each others' evolution. Of the following, which could be possible ages for the system? Select all that apply and explain your answer in a few sentences.

1. 10⁷ yr
2. 10⁸yr
3. 10⁹ yr
4. 3x10¹⁰ yr
5. 10¹¹ yr